ECS Meeting Abstracts最新文献

{"title":"Investigation of the Performance and Durability of Reactive Spray Deposition Fabricated Electrodes on a Bifunctional Membrane for Alkaline Water Electrolysis and CO₂ Reduction Reaction","authors":"Alanna M. Gado, Deniz Ipekçi, Stoyan Bliznakov, Leonard J. Bonville, Jeffrey McCutcheon, Radenka Maric","doi":"10.1149/ma2023-01382250mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01382250mtgabs","url":null,"abstract":"Alkaline water electrolysis (AWE) is a promising technology for carbon capture [1]. Anion exchange membrane water electrolyzers (AEMWEs) utilize low-cost, non-precious metal materials, providing an economically viable alternative to more expensive proton exchange membrane water electrolyzers (PEMWEs). While PEMWEs can operate at much higher current densities, they require noble metal catalysts and titanium components for the high potential environment anode [1]. The implementation of a bipolar membrane (BPM) will allow both HER and OER to occur under kinetically favorable conditions [2, 3] by combining both thin AEM and thin PEM layers within a single membrane. AEMs, PEMs, and BPMs have been tested in CO2RR electrolyzers [4]. The BPM may provide a pathway to combine the advantages of both AEMs and PEMs for CO 2 reduction. Altering both the membrane and CCM is a focus in the research and development in CO 2 RR electrolyzers. Lee et al. [5] explored the use of a porous membrane for CO2 reduction. While work can be done to improve performance and crossover, the porous membrane provided excellent mechanical properties and good economic potential. There has been some work done on developing bifunctional membranes for water electrolysis and CO 2 reduction [3, 6, 7]. Two key issues with operation of a CO 2 RR electrolyzer with a BPM is the reactant CO 2 that is lost to the AEM and PEM membrane layer interface and the instability of the cell. Both issues contribute to a significant decrease in performance and faradaic efficiency in product conversion. Development of the BPM, both on the membrane’s fabrication and configuration, and electrode layers, needs to be explored to reach higher performances and longer lifespans. In this work, reactive spray deposition technology (RSDT) was used to fabricate electrodes on a UConn fabricated bipolar membrane. Testing of each configuration was conducted as both an AEM water electrolyzer and CO 2 RR electrolyzer. Polarization, electrochemical impedance spectroscopy, electrochemical equivalent circuits, and distribution of relaxation times were used to investigate cell performance and durability. References [1] B. Mayerhofer, D. McLaughlin, T. Bohm, M. Hegelheimer, D. Seeberger, and S. Thiele, “Bipolar membrane electrode assemblies for water electrolysis,” ACS applied energy materials, vol. 3, no. 10, pp. 9635–9644, 2020. [2] J. Xu, I. Amorim, Y. Li, J. Li, Z. Yu, B. Zhang, A. Araujo, N. Zhang, and L. Liu, “Stable overall water splitting in an asymmetric acid/alkaline electrolyzer comprising a bipolar membrane sandwiched by bifunctional cobalt-nickel phosphide nanowire electrodes,” Carbon Energy, vol. 2, no. 4, pp. 646–655, 2020. [3] Q. Lei, B. Wang, P. Wang, and S. Liu, “Hydrogen generation with acid/alkaline amphoteric water electrolysis,” Journal of Energy Chemistry, vol. 38, pp. 162–169, 2019. [13] W. H. Lee, K. Kim, C. Lim, Y. J. Ko, Y. J. Hwang, B. K. Min, U. Lee, and H. S. Oh, “New strategies for economically f","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fe and Zn Addition Effects of Ti Oxide-Based Electrocatalyst on Catalytic Activity for Oxygen Reduction Reaction","authors":"Koichi Matsuzawa, Momo Obata, Yuu Takeuchi, Yoshiro Ohgi, Takaaki Nagai, Ryuji Monden, Akimitsu Ishihara","doi":"10.1149/ma2023-01382244mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01382244mtgabs","url":null,"abstract":"The conventional catalyst of polymer electrolyte fuel cell (PEFC) is a platinum which is categorized as precious metal with very high-cost material, and its performance is limited in principal. From this point of view, the non-precious metal electrocatalyst should be required. We have focused and studied group 4 and 5 metal oxide-based electrocatalyst as non-platinum catalysts for the oxygen reduction reaction (ORR) because of low-cost, abundant reserves, and high stability in acidic electrolytes [1-2]. We found that titanium oxide prepared from TiOTPyzPz supported on multi-walled carbon nanotubes had superior ORR activity [3]. On the other hand, it was published as an international patent that the addition of other elements such as Fe and Ni is affected to enhance the ORR activity of Ti oxide-based electrocatalyst [4]. We have also applied for the TiOTPyzPz as a starting material with Fe, Ni, and Zn addition to enhance the ORR activity of Ti oxide-based electrocatalyst [5-6]. In this study, we have investigated the addition effects of Zn and Fe for Ti oxide-based electrocatalyst on the catalytic activity for the ORR. 2,3-Dicyanopyrazine, urea, and Ti isopropoxide were dissolved in quinoline and refluxed to synthesize TiOTPyzPz. Iron acetate and zinc acetate were also added to dissolve in quinoline to obtain the Fe and Zn-added TiOTPyzPz as a starting material. These starting materials were mixed with carbon nanotube by ball-milling to prepare the precursors. These precursors were heat-treated under low oxygen partial pressure at 900 o C for 3 h to obtain the oxide-based electrocatalyst powder. The catalyst powder was dispersed into 1-propanol with Nafion solution to prepare a catalyst ink. The ink was dropped on a glassy carbon rod to use as a working electrode in electrochemical measurement. Electrochemical measurements were performed in 0.5 mol dm -3 H 2 SO 4 at 30 o C with a conventional 3-electrode cell. A reversible hydrogen electrode (RHE) and a glassy carbon plate were used as used as a reference and counter electrode, respectively. Slow scan voltammetry (SSV) was performed at a scan rate of 5 mV s -1 from 0.2 V to 1.2 V vs. RHE under O 2 and N 2 . The ORR current ( i ORR ) was determined by calculating the difference between the current under O 2 and N 2 . Figure 1 shows the ORR polarization curves Fe and/or Zn addition to the Ti oxide-based electrocatalysts. The Fe and Zn added Ti oxide-based electrocatalyst (Fe,Zn-TiO x ) was obviously the highest activity for the ORR, and it was higher ORR activity than Fe added Ti oxide-based electrocatalyst (Fe-TiO x ), Zn added Ti oxide-based electrocatalyst (Zn-TiO x ), and Ti oxide-based electrocatalyst (TiO x ) without addition. It reveals that the addition of Fe and Zn was found to be effective for enhancing the ORR activity, and Fe addition was more effective than Zn addition for enhancing the ORR activity. XRD pattern of TiO x shows several peaks identified TiO 2 -Rutile and TiC 0.3 N 0.7 whi","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel Electrochemical Sensing Platform Based on Bimetallic Ru-Cu-MOF for the Voltammetric Detection of Ciprofloxacin Antibiotic","authors":"Varsha M V, Gomathi Nageswaran","doi":"10.1149/ma2023-01442380mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01442380mtgabs","url":null,"abstract":"Metal-organic frameworks (MOFs) are an attractive class of highly ordered, crystalline, porous materials that exhibit large specific surface area, porosity, tunable structure and ease of functionalization. The presence of a number of uniformly dispersed metal components i.e. catalytic molecular units throughout the framework make MOF based materials a potential candidate for electrochemical sensing studies. However, pristine MOFs have the inherent drawbacks such as the inferior electrical conductivity that need to be addressed for its direct application in sensing platforms. In this context, the design of redox-active and highly conducting MOF is a research hotspot in the material science since it can overcome the inferior electrocatalytic activity of chemically modified electrodes (CME) based on pristine MOF. The integration of highly conducting metals into the framework is an efficient method to enhance the electric conductivity and thereby the electrochemical activity of synthesized material. The synergistic effect arising from the combination of different metal ions changes the surface electronic structure of MOF and thereby improve the mobility of charge carriers. Herein, an electrochemical sensing platform based on ruthenium doped Cu-MOF was developed for the sensitive detection of ciprofloxacin antibiotic. This work focuses on the synthetic strategy of Ru-Cu-TMA where the parent MOF, Cu-TMA, was synthesised by a facile room temperature mixing at ambient pressure. The present synthetic method is found to be a simple and efficient method compared to the conventional solvothermal method reported commonly for MOF synthesis. The successful integration of ruthenium into Cu-MOF created a number of electrocatalytic active sites which can favour the interaction with analyte species in sensing studies. The structural features and morphology of the synthesized MOF materials were studied using different characterization techniques like XRD, IR, SEM, XPS etc. The porous structure of MOF combined with higher reaction kinetics due to the incorporation of ruthenium cause a synergistic effect which makes the mixed-valent MOF a promising candidate for sensing studies. The composite, Ru-Cu-TMA, prepared was used as an electrode modifier for the sensitive detection of ciprofloxacin by electrochemical technique. Initially, the electrochemical activity of the chemically modified electrodes were examined and Ru-Cu-TMA modified electrode shows the higher current and fast electron transfer which paves the way for its application as sensing material. In addition, more number of active sites formed in MOF by ruthenium doping considerably increases the sensing performance of Ru-Cu-TMA. The electrochemical oxidation of ciprofloxacin on electrode surface is confirmed as an irreversible, diffusion-controlled process. The sensor exhibited a wide linear dynamic range (2.5 – 100 µM) with a lower limit of detection (3.29 nM) and sensitivity 0.0524 µA/µM. Moreover, the senso","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dependence of Faraday Efficiency on Operation Conditions and Cell Properties for Proton Ceramic Electrolysis Cells","authors":"Qian Zhang, Clarita Y. Regalado Vera, Hanping Ding, Wei Tang, Wei Wu, Scott A Barnett, Peter W. Voorhees, Dong Ding","doi":"10.1149/ma2023-0154186mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-0154186mtgabs","url":null,"abstract":"Proton-conducting solid oxide electrolysis cells (p-SOECs) have attracted much attention due to their low operating temperature and low degradation rate compared with conventional oxygen-ion conducting solid oxide electrolysis cells (o-SOEC). However, p-SOECs suffer from relatively low Faradaic efficiency due to the electronic leakage of the electrolyte. Using an electrolyte charge carrier transport model, we quantified the dependence of Faraday efficiency on the electrolysis operation conditions. Our model describes the transport of charge carriers in the electrolyte when the polarization resistance can not be neglected during cell operations. By accounting for the overpotentials at the interface of electrode and electrolyte in the model, we found that the Faraday efficiency decreases with the increasing current densities at electrolysis mode for both BZY20 and BCZYYb. Our results provide significant insights into the development of highly efficient p-SOECs .","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential Dependent Evolution of Electric Double Layer at Electrode/Water Interface","authors":"Fujia Zhao, Yingjie Zhang","doi":"10.1149/ma2023-01462507mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01462507mtgabs","url":null,"abstract":"Water structure at electrode interface can affect electrochemical reactions in multiple ways, as it plays important role in processes including mass transport, surface adsorption, and charge transfer. Thus, in-situ characterization of electrode/water interface is in high demand for a deeper understanding and better utilization of electrochemical systems. Here, we introduce our study on the evolution of interfacial water structure with changing electric potential. Configurational and structural understanding were obtained by in-situ Raman spectroscopy and atomic force microscopy (AFM) measurements respectively, with special efforts to enhance interfacial sensitivity for both techniques. Our study demonstrated electric potential dependent changes in the hydrogen bonding network and hydration layer structure, which provides new insight into how interfacial hydration structure can be correlated with the electrochemical reaction performance.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Metal-Substitution within Ruthenium Oxide on Structure and Oxygen Evolution Activity and Stability","authors":"Luis A Albiter, Kathleen O. Bailey, Jose Fernando Godinez Salomon, Christopher P. Rhodes","doi":"10.1149/ma2023-01362026mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01362026mtgabs","url":null,"abstract":"The development and utilization of proton exchange membrane water electrolyzers (PEMWEs) is hindered by the cost, activity, and stability of the oxygen evolution reaction (OER) electrocatalyst. Iridium oxide (IrO x ) is currently the go-to OER electrocatalyst, as it has been shown to have relative high activity and stability when compared to other OER active catalysts. However, iridium is one of the rarest elements in the Earth’s crust, and therefore cost is a major limitation of iridium-based electrocatalysts. Ruthenium oxide (RuO 2 ) is much lower cost and more active than iridium oxide; however, RuO 2 it is unstable in acidic media and undergoes degradation over time. We investigated substituting niobium, tantalum, and zirconium, which are OER-stable metals, into RuO 2 to improve the OER stability. Our study explored the effects of different metals and varied concentrations within RuO 2 (Ru 1-x M x O 2 , M = Nb, Ta, and Zr) on the structure, morphology, OER activity, and stability. The structure and morphology were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy, and scanning electron microscopy. Preliminary results from XRD showed observable phase separation at higher concentrations of Nb, Ta, and Zr and less phase separation at lower concentrations for Nb and Ta. There was no observable phase separation for Zr at lower concentrations. XRD peak shifts were observed and indicate the incorporation of the metal ions into the crystal structure of rutile RuO 2 . The OER activities and stabilities of Ru 1-x M x O 2 were measured using a rotating disk electrode configuration and compared with synthesized RuO 2 . Our preliminary results show that the OER activity and stability are strongly affected by the addition of the different metals and could be attributed to morphology and structural changes. Our findings help to further the development of lower cost, high activity, and increased stability OER electrocatalysts, which are crucial to the large-scale adoption of PEMWE’s.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metallic Glass Nanofoam Anode Catalysts for Anion-Exchange Membrane Water Electrolyzers","authors":"Qiurong Shi, Michael J. Zachman, Deborah J. Myers, Hui Xu, Gang Wu","doi":"10.1149/ma2023-01362068mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01362068mtgabs","url":null,"abstract":"Alkaline anion-exchange membrane water electrolyzers (AEMWEs) for hydrogen production are now receiving intensive attention due to their feasibility to use sustainable, low-cost platinum group metal (PGM-free) catalysts. Although a variety of highly efficient PGM-free catalysts for the oxygen evolution reaction (OER) have been explored, few of them demonstrated satisfied performance in real AEMWEs due to the insufficient electrical conductivity and unfavorable interfaces with ionomers in 3D porous electrodes. Herein, we report a series of highly porous ternary NiFeM (M: Cu, Co, and Mn) metallic glassy catalysts featured with nanofoam network morphologies, which are composed of amorphous OER active metal oxide shells and highly electrically conductive metallic glass alloy cores. Due to these unique properties, these NiFeM nanofoam catalysts demonstrated promising OER activities and stabilities in the half-cell with aqueous alkaline electrolytes, especially at high potentials. We also examined their magnetic properties and found no direct correlation with measured OER activity. These ternary NiFeM catalysts are further integrated with unique ionomers and AEMs to fabricate AEMWEs, showing superior performance to binary NiFe and commercial IrO 2 catalysts when utilizing diluted KOH electrolytes. A different trend was identified when directly using desirable but challenging pure water, and the NiFeCu catalyst performed the best comparable to IrO 2 especially at high current densities. Although deep understanding on limiting factor of pure water AEMWEs is still required, these NiFeM catalysts with favorable catalytic and morphological properties representing a new class of highly efficient PGM-free anode catalysts for viable AEMWEs toward clean hydrogen generation.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"(Invited) Photoelectrochemical CO₂ Reduction (CO₂R) with Si- and III-V Based Systems","authors":"Thomas F. Jaramillo","doi":"10.1149/ma2023-01372159mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01372159mtgabs","url":null,"abstract":"One means to produce carbon-based fuels and chemicals in a sustainable manner is by means of solar photoelectrochemical (PEC) CO 2 reduction (CO 2 R). Many R&D challenges need to be addressed in order to advance this technological area toward commercial applications. This paper will focus on developing catalytic interfaces onto silicon and III-V semiconductor based systems, and exploring the impacts of various microenvironments and reaction conditions on efficiency, selectivity, and durability. Interfaces based on copper-based catalysts will be a general theme, leading to a range of multi-carbon products by means of PEC CO 2 R.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solid Oxide Electrolysis Cells Fabrication: From Single Cells to Batch Production","authors":"Violeta Ureña Torres, Kandela Ruiz, Paula Ciaurriz, Xabier Judez, Mónica Aguado, Iñigo Garbayo","doi":"10.1149/ma2023-015442mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-015442mtgabs","url":null,"abstract":"Energy transition towards a net-zero emission scenario requires, primarily, a significant increase on the renewable energy production capabilities. However, the inherent intermittency of most common renewable sources, added to the limitations of full electrification in some important hard-to-abate sectors (heavy-duty transport, aviation, steel industry...), implies also the need of developing reliable solutions for energy conversion and storage. Here, hydrogen is gaining more and more popularity in the recent years as an effective solution as energy carrier, mostly for the decarbonization of the key industries and transport. Among the different technologies under development for power-to-hydrogen conversion, solid oxide electrolysis (SOE) outstands due to its high conversion efficiency, fuel flexibility (e.g. CO 2 electrolysis) and possibility of working in reversible mode (the same device both as electrolyser and fuel cell). Currently behind competing low temperature electrolysis technologies (AEL, PEMEL) in terms of technology readiness, main challenges of SOE today relate to long-term degradation, heat management and design and reliable fabrication of large stacks and systems. Although many projects are lately flourishing in this line, the number of players able to demonstrate an upscaled fabrication of SOE stacks and systems is still limited. The work presented here represents the first step carried out at CENER for the future demonstration of a pilot fabrication line of SOE stacks, from the optimization of functional materials and inks to the fabrication of single cells and building of 2-10 kW stacks. In this study, a fabrication route for SOE planar cells (5x5 cm 2 ) is proposed, including the optimization of every single step of the process: raw material pre-treatment, ink/slurry development, functional printing and sintering. Particular emphasis is placed on ensuring a reliable upscaling for batch production of cells and thus materials are processed in large quantities (~1 L/batch). In terms of functional materials, standard electrode and electrolytes are chosen in a first approach, viz. Ni-YSZ as hydrogen electrode, YSZ as electrolyte and LSM-YSZ as air electrode. For film deposition, tape casting and screen printing techniques are combined. The electrochemical characterization of the fabricated cells will be presented and compared with commercial ones, including degradation analysis.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of Self-Assembled Molecules Based on Tetraphenylethene-Core Inducing Emission","authors":"Hoang Thi Thuy Tran, Donghwan Kim, Maxime Rémond, Eunkyoung Kim","doi":"10.1149/ma2023-01512818mtgabs","DOIUrl":"https://doi.org/10.1149/ma2023-01512818mtgabs","url":null,"abstract":"Aggregation-induced emission (AIE) organic materials have been extensively explored for a future sensible and interactive display to provide high luminescence in ordered states. However, it is challenging for reducing exciton quenching of aggregated materials to achieve high emission and increasing ordered structure to yield high crystallinity as well. To this end, the new structures based on tetraphenylene (TP) core were synthesized by attaching TP with clipping groups (C) consisting of a self-assembling group (SAG) to enhance emission intensity and spectra shift. As the emissive materials for self-assembly, TPCns with different clip numbers (n=1,2,4) were synthesized through the Wittig-Hörner reaction, where clips consist of extended π-conjugated moiety and the alkyl chain as a segment. The clips could introduce van der Waals interaction to facilitate self-assembly among clips and clip-connected aromatic units. These structures were confirmed and analyzed by different tools including 1 HNMR, 13 CNMR, FTIR-ATR, element analysis, MALDI-TOF/TOF. The optical properties of TPCns were discussed in solution state and solid state. In terms of photoluminescent emission, the TPC4 showed a more yellowish-green emission (λ em = 525nm in THF) and large aggregation-induced emission enhancement (EAIE) in aqueous (f w > 50%) THF solution. The greenish blue emission was realized for TPC1 at the maxima wavelength 481 nm and reached 100% quantum yield in the solid state. Furthermore, due to strong twisted intramolecular charge transfer, TPCn molecules had large Stokes shifts in ranges of 5800–6800 cm −1 for TPC1, TPC2, and 10700–12500 cm −1 for TPC4.","PeriodicalId":11461,"journal":{"name":"ECS Meeting Abstracts","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135089034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}