Porphyrin Science by Women最新文献_第10页

pH Driven self-assembly of aza-BODIPY J-aggregates pH驱动aza-BODIPY j -聚集体的自组装

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S108842461950041X

Miffy H Y Cheng, Shuozhen Bao, G. Zheng, Juan Chen

{"title":"pH Driven self-assembly of aza-BODIPY J-aggregates","authors":"Miffy H Y Cheng, Shuozhen Bao, G. Zheng, Juan Chen","doi":"10.1142/S108842461950041X","DOIUrl":"https://doi.org/10.1142/S108842461950041X","url":null,"abstract":"A pH-driven self-assembly of a simple aza-BODIPY was discovered in PBS solution, whereby ion-specific J-aggregated nanostructures were generated at very low dye concentration (2.5–20 [Formula: see text]M). The aggregation process was investigated in different conditions (pH, temperature and time) by monitoring absorption spectral shifts and associated nanostructure morphological changes. The pH-driven self-assembly process demonstrated an instantaneous thermodynamic phenomenon associated with three characteristic structures, each with distinctive optical properties. When the sample was first formulated within a short time window, a thermodynamically less stable intermediate with an unusual morphology of triangular nanoplates and broad absorption was observed. The formation of these structures was independent of the ions in PBS solution (Na[Formula: see text], K[Formula: see text], thus indicating that the triangular structure was inherent to the anisotropic structure of aza-BODIPY scaffolds. The second structure associated with a metastable pathway generated a uniform population of spherical nanovesicles, while the third structure, generated through a more thermodynamically stable pathway consisted of fibers. The absorption spectra suggested that both spherical and fiber structures contributed to the J-aggregation band at 735 nm in the near infrared optical spectrum and their population in each formulation was concentration dependent. The results highlighted the significance of ion effects in self-assembly of aza-BODIPY and the mechanistic structural changes of the morphology. Furthermore, this fundamental discovery offers a versatile method for the self-assembly of aza-BODIPY J-aggregates as a new nanoplatform with potential photonic applications.","PeriodicalId":20283,"journal":{"name":"Porphyrin Science by Women","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76986881","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}

引用次数: 2

Porphyrin-based homogeneous catalysts for the CO2 cycloaddition to epoxides and aziridines 卟啉基均相催化剂用于CO2环加成环氧化物和叠氮醚

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S1088424619300015

D. Intrieri, C. Damiano, P. Sonzini, E. Gallo

引用次数: 12

Er(III) and Lu(III) complexes of 2(3),9(10),16(17),23(24)-tetrakis- and 2,3,9,10,16,17,23,24-octakis-[4-(1-methyl-1-phenylethyl)phenoxy]phthalocyaninato. Synthesis and spectroscopic properties 2(3)、9(10)、16(17)、23(24)-四-和2,3、9、10、16、17、23、24-八-[4-(1-甲基-1-苯乙基)苯氧基]酞菁色素的Er(III)和Lu(III)配合物。合成及光谱性质

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S1088424619500251

T. Tikhomirova, Kseniya Nalimova, A. Kerner, A. Vashurin, S. Znoyko

引用次数: 4

Molecular pathways in cancer response to photodynamic therapy 癌症对光动力疗法反应的分子途径

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S1088424619300064

V. Rapozzi, Francesca D'Este, L. Xodo

引用次数: 10

Clam-shaped cyclam-functionalized porphyrin for electrochemical reduction of carbon dioxide 蛤形环蛤功能化卟啉电化学还原二氧化碳

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S1088424619500548

Sumana Tawil, Hathaichanok Seelajaroen, A. Petsom, N. S. Sariciftci, P. Thamyongkit

{"title":"Clam-shaped cyclam-functionalized porphyrin for electrochemical reduction of carbon dioxide","authors":"Sumana Tawil, Hathaichanok Seelajaroen, A. Petsom, N. S. Sariciftci, P. Thamyongkit","doi":"10.1142/S1088424619500548","DOIUrl":"https://doi.org/10.1142/S1088424619500548","url":null,"abstract":"A clam-shaped molecule comprising a Zn(II)-porphyrin and a Zn(II)-cyclam is synthesized and characterized. Its electrochemical behavior and catalytic activity for homogeneous electrochemical reduction of carbon dioxide (CO[Formula: see text] are investigated by cyclic voltammetry and compared with those of Zn(II)-meso-tetraphenylporphyrin and Zn(II)-cyclam. Under N2-saturated conditions, cyclic voltammetry of the featured complex has characteristics of its two constituents, but under CO2-saturated conditions, the target compound exhibits significant current enhancement. Iterative reduction under electrochemical conditions indicated the target compound has improved stability relative to Zn(II)-cyclam. Controlled potential electrolysis demonstrates that, without addition of water, methane (CH[Formula: see text] is the only detectable product with 1% Faradaic efficiency (FE). The formation of CH4 is not observed under the catalysis of the Zn(II)-porphyrin benchmark compound, indicating that the CO2-capturing function of the Zn(II)-cyclam unit contributes to the catalysis. Upon addition of 3% v/v water, the electrochemical reduction of CO2 in the presence of the target compound gives carbon monoxide (CO) with 28% FE. Dominance of CO formation under these conditions suggests enhancement of proton-coupled reduction. Integrated action of these Zn(II)-porphyrin and Zn(II)-cyclam units offers a notable example of a molecular catalytic system where the cyclam ring captures and brings CO2 into the proximity of the porphyrin catalysis center.","PeriodicalId":20283,"journal":{"name":"Porphyrin Science by Women","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85487340","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}

引用次数: 1

Nitrobenzene method: A keystone in meso-substituted halogenated porphyrin synthesis and applications 硝基苯法:中位取代卤化卟啉合成及其应用的关键

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S1088424619300039

S. Pinto, Carolina Vinagreiro, Vanessa A. Tomé, Giusi Piccirillo, L. Damas, Mariette M. Pereira

引用次数: 6

Fabrication of Langmuir–Blodgett chiral films from cationic (L)-proline-porphyrin derivatives 阳离子(L)-脯氨酸-卟啉衍生物制备Langmuir-Blodgett手性膜

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S1088424619500305

N. Colozza, M. Stefanelli, M. Venanzi, R. Paolesse, D. Monti

引用次数: 5

Photoproperties, PVP formulation and 19F NMR of a Zn phthalocyanine with 24 magnetically pseudo-equivalent fluorine atoms 具有24个磁性伪等效氟原子的锌酞菁的光性质、PVP配方和19F NMR

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S1088424619500512

Tuğba Küçük, S. Alpugan, Derya Davarcı, Eda Gazel Pehlivan, Sümeyra Bayır, U. Tazebay, F. Dumoulin

引用次数: 3

Novel axially-substituted silicon phthalocyanines with pH-modulated fluorescence ON/OFF switching properties 具有ph调制荧光ON/OFF开关特性的新型轴向取代酞菁硅

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S1088424619500329

Belgin Şahin, Merve Zeyrek Ongun, S. Z. Topal, A. Gürek, D. Atilla

引用次数: 1

Cobalt phthalocyanine-TiO2 nanocomposites for photocatalytic remediation of textile dyes under visible light irradiation 酞菁钴- tio2纳米复合材料在可见光下光催化修复纺织染料

Porphyrin Science by Women Pub Date : 2019-04-01 DOI: 10.1142/S1088424619500482

Gizem Başaran Dindaş, Z. Şahin, H. C. Yatmaz, Ümit Işci

{"title":"Cobalt phthalocyanine-TiO2 nanocomposites for photocatalytic remediation of textile dyes under visible light irradiation","authors":"Gizem Başaran Dindaş, Z. Şahin, H. C. Yatmaz, Ümit Işci","doi":"10.1142/S1088424619500482","DOIUrl":"https://doi.org/10.1142/S1088424619500482","url":null,"abstract":"CoPc(COOH)[Formula: see text]-TiO[Formula: see text] nanocomposites to be used as efficient visible light photocatalysts were obtained by modifying TiO2 nanoparticles with cobalt(II) tetracarboxyphthalocyanine (CoPc(COOH)[Formula: see text]). The photocatalyst was then characterized by ultra-violet diffuse reflectance spectroscopy (UV-DRS), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The UV-DRS spectra showed that the absorbance spectrum of the modified catalyst was shifted to the visible region. Different textile dye solutions of Reactive Red 180, Acid Red 88 and Direct Orange 46 were efficiently degraded under visible light. Color removal rates were established to be 30%, 53% and 47% after 180 min for RR180, AR88 and DO46 dyes, respectively. The optimum catalyst concentration was determined to be 1 g/L of CoPc(COOH)[Formula: see text]-TiO[Formula: see text]. Development of the CoPc(COOH)[Formula: see text]-TiO[Formula: see text] nanocomposite photocatalyst enabled the utilization of visible light irradiation for efficient photodegradation of organic textile dye solutions.","PeriodicalId":20283,"journal":{"name":"Porphyrin Science by Women","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82907568","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}

引用次数: 10