ChemPhotoChem最新文献_第4页

Spectroscopic Response of Chiral Proteophenes Binding to Two Chiral Insulin Amyloids 手性蛋白酶与两种手性胰岛素淀粉样蛋白结合的光谱响应

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-09-20 DOI: 10.1002/cptc.202400225

Takahiro Watanabe, Priyanka Swaminathan, Linnea Björk, Ayaka Nakanishi, Hisako Sato, Tamotsu Zako, K. P. R. Nilsson, Mikael Lindgren

{"title":"Spectroscopic Response of Chiral Proteophenes Binding to Two Chiral Insulin Amyloids","authors":"Takahiro Watanabe, Priyanka Swaminathan, Linnea Björk, Ayaka Nakanishi, Hisako Sato, Tamotsu Zako, K. P. R. Nilsson, Mikael Lindgren","doi":"10.1002/cptc.202400225","DOIUrl":"10.1002/cptc.202400225","url":null,"abstract":"We recently reported on 8 different pentameric oligothiophenes, denoted proteophenes, with different amino acid substitution patterns along the conjugated thiophene backbone. The proteophenes were forming chiral both molecular (solvent dissolved) and self-assembled nano-architectonic structures, the latter having approximately 5–6 times greater ICD responses. Herein, two proteophenes, HS-84-E−E and HS-84-K−K, were further investigated in terms of binding to two chiral variants of insulin amyloid fibrils. Binding curves based on fluorescence revealed strong primary binding sites for both proteophenes and more unspecific secondary binding for especially the latter. Interestingly, their induced circular dichroism (ICD) responses were similar to or stronger than for their solvent form and showed a complicated alteration upon binding suggesting that the microstructure at the binding site governs the helical structure of the ligand. Hyperspectral fluorescence microscopy and FLIM revealed more details on the molecular binding in terms of proteophene emission decay-times. Vibrational circular dichroism (VCD) analysis showed that VCD signal of amyloid fibrils was enhanced upon binding of proteophenes, suggesting changes in the amyloid microstructures.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202400225","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel Photobase Generators Derived from Proazaphosphatrane–Aryl Borate for High-Pressure Mercury Lamp Lithography 用于高压汞灯光刻技术的新型原氮磷酸盐-芳基硼酸盐光基发生器

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-09-19 DOI: 10.1002/cptc.202400206

Yuji Shibasaki, Junichi Sato

{"title":"Novel Photobase Generators Derived from Proazaphosphatrane–Aryl Borate for High-Pressure Mercury Lamp Lithography","authors":"Yuji Shibasaki, Junichi Sato","doi":"10.1002/cptc.202400206","DOIUrl":"10.1002/cptc.202400206","url":null,"abstract":"Herein, novel borate-type photobase generators (PBGs) that generate a proazaphosphatrane known as Verkade's base (2,8,9-triisobuthyl-2,5,8,9-tetraaza-1-phosphabicyclo[3.3.3]undecane (TTP)) were developed for photopatterning using a high-pressure mercury lamp. Eight PBGs were synthesized, each featuring distinct borate substituents: phenyl, p-fluorophenyl, p-tolyl, p-methoxyphenyl, m-fluoro-p-methylphenyl, 4-biphenyl, 2-naphthyl, and 6-methoxy-2-naphthyl. The relation between these substituents and their light absorption characteristics was analyzed via ultraviolet–visible spectroscopy and time-dependent density functional theory calculations. The PBG with the 6-methoxy-2-naphthylborate group (TTP–tetrakis[2-(6-methoxynaphthyl)]borate (TTP–TMNB)) demonstrated substantial light absorption near 365 nm (the i-line of the high-pressure mercury lamp), generating approximately 60 % of the corresponding TTP in deuterated tetrahydrofuran (THF) upon exposure to 650 mJ/cm2, as confirmed via 1H nuclear magnetic resonance spectroscopy. To evaluate its photolithographic potential, TTP–TMNB was mixed with epoxy resin (jER1001) and a poly(methacrylic acid)-co-poly(methyl methacrylate) copolymer (PMA1.6-co-PMMA100) in THF. The resulting mixture was spin-coated onto a silicon wafer and irradiated with the i-line through a photomask to create a negative-tone image. The sensitivity and contrast of this photopolymer system were measured to be 45 mJ/cm2 and 1.0, respectively; moreover, a clear 10-μm negative-tone resolution was achieved.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"8 12","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202400206","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modulating N−H Bond Cleavage in Catalytic Ammonia Oxidation Reaction 调节催化氨氧化反应中的 N-H 键裂解

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-09-19 DOI: 10.1002/cptc.202400210

Lei Wu, Zhenlin Chen, Yuchao Zhang

引用次数: 0

Design and Synthesis of Aggregation-Caused Quenching Hydroxy-Phenanthroimidazole Derivatives for Probing of Fe3+ Ions and as Potential Blue Light Emitters 设计和合成聚合引起淬火的羟基菲咯咪唑衍生物，用于探测 Fe3+ 离子并用作潜在的蓝光发射器

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-09-19 DOI: 10.1002/cptc.202400188

Nisha Odedara, Niteen Borane, Rajamouli Boddula

{"title":"Design and Synthesis of Aggregation-Caused Quenching Hydroxy-Phenanthroimidazole Derivatives for Probing of Fe3+ Ions and as Potential Blue Light Emitters","authors":"Nisha Odedara, Niteen Borane, Rajamouli Boddula","doi":"10.1002/cptc.202400188","DOIUrl":"10.1002/cptc.202400188","url":null,"abstract":"Fluorescence aggregated molecules tend to employ versatile opportunities in metal ion probe sensors and fluorescent lighting. To achieve this dual challenging task, currently synthesized three phenanthroimidazole-naphthalene-based compounds Pq-tBu-OH, Pq-mF-OH, and Pq-pF-OH are derived based on substitution at N1 position for better photophysical and electrochemical properties. Compared experimental and theoretical calculations define the highest bandgap to be 2.75 eV of Pq-pF-OH, and the same molecule expressed a higher (348 °C) thermal decomposition. The calculated singlet and triplet energies found in the range of 3.24–3.67 and 2.70–2.72 eV indicate well energy transfer from S1→S0 (quantum yield of 23.36 %, lifetime is 4.05 ns). Among the numerous morphologies, the solid form exhibited improved intensive deep blue emission (x=0.159, y=0.051), and its InGaN LED results demonstrated a strong deep blue emission at 418 nm. Moreover, the fluorophores were experimentally visualizing the aggregation-caused quenching (ACQ) which enables the probing of Fe3+ ion. However, for the first time, the ACQ-assisted concept is applied through synthesized molecules for Fe3+ ion probing via fluorescence spectra, Job's plot calculation, and 1H NMR results. In addition, the probe works excellently at a detection limit of 10 μM and it could also act as a potential competitor for lighting applications.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"8 12","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Innovative Biphasic Reaction System for Highly Selective Benzene Hydroxylation based on Photocatalytic Polymer Composites 基于光催化聚合物复合材料的高选择性苯羟化创新双相反应系统

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-09-18 DOI: 10.1002/cptc.202400203

Antonietta Mancuso, Rosaria Anna Picca, Margherita Izzi, Cinzia Di Franco, Olga Sacco, Vincenzo Vaiano, Vincenzo Venditto

{"title":"An Innovative Biphasic Reaction System for Highly Selective Benzene Hydroxylation based on Photocatalytic Polymer Composites","authors":"Antonietta Mancuso, Rosaria Anna Picca, Margherita Izzi, Cinzia Di Franco, Olga Sacco, Vincenzo Vaiano, Vincenzo Venditto","doi":"10.1002/cptc.202400203","DOIUrl":"10.1002/cptc.202400203","url":null,"abstract":"The hydroxylation of benzene to phenol in presence of hydrogen peroxide was performed using a new biphasic system consisting of a solid phase, a photocatalytically active monolithic polymer composite, immersed in an aqueous phase in which H2O2 is dissolved. In detail, ZnO photocatalytic particles were embedded into the hydrophobic syndiotactic polystyrene (sPS) polymer. Zinc oxide nanostructures (ZnO NSs) were synthesized by an electrochemical procedure. The surface morphology and structure of ZnO nanoparticles and ZnO-sPS monolithic aerogel composite (ZnO/sPS) were investigated by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy analysis. Photocatalytic results evidenced that, under UV irradiation, both ZnO NSs and biphasic system water-photocatalytic composites had a high benzene oxidative property but with very low phenol yield (<2 %) at pH=7. To enhance the phenol selective formation, the pH of the aqueous solution surrounding the photocatalytic polymer composite was modified. A phenol yield of about 94 % and benzene conversion higher than 99 % was obtained in alkaline conditions (pH=11).","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"8 12","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical Insight into Fluorination on Low-Cost A-π-D-π-A Type Donor Materials for All-Small-Molecule Organic Photovoltaic Cells 对用于全小分子有机光伏电池的低成本 A-π-D-π-A 型供体材料氟化作用的理论洞察

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-09-17 DOI: 10.1002/cptc.202400264

Jia-Qian Nong, Jin-Hong Han, Jian Pan, Zhi-Wen Zhao, Yan-Ling Wang, Qing-Qing Pan, Su-Qin Liu, Hong-Hong Fan

{"title":"Theoretical Insight into Fluorination on Low-Cost A-π-D-π-A Type Donor Materials for All-Small-Molecule Organic Photovoltaic Cells","authors":"Jia-Qian Nong, Jin-Hong Han, Jian Pan, Zhi-Wen Zhao, Yan-Ling Wang, Qing-Qing Pan, Su-Qin Liu, Hong-Hong Fan","doi":"10.1002/cptc.202400264","DOIUrl":"10.1002/cptc.202400264","url":null,"abstract":"Low-cost organic photovoltaic (OPV) devices have shown enormous potential in large-scale industrial applications. And it has attracted widespread attention in the past few decades. However, the photophysical characteristics of these budget-friendly materials haven't been explored much. Here, low-cost small materials, including small molecule 1 (asm1) with ortho-fluorinated side chain and small molecule 2 (asm2) with meta-fluorinated side chain were selected to probe the fluorination effect on the absorption spectra, electrochemical energy levels, electrostatic potential (ESP), etc. The results show that the molecules asm1 and asm2 have good planarity of the backbone. And the meta-fluorinated side chain of asm2 contributes more to the highest occupied molecular orbital and less to the lowest unoccupied molecular orbital than asm1. Moreover, differences in ESP are found between donor and acceptor materials. Furthermore, strong and broad light absorption in the visible region of these low-cost molecules is observed, resulting in a better short-circuit current density for the devices constructed by the donors asm1, asm2, and acceptor Y6. In addition, more charge transfer mechanisms are characterized for the asm1/Y6 system. The introduction of ortho-fluorination in the conjugated side chain of the molecule is a favorable approach, which will provide theoretical guidance for further molecular design experiments.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"8 12","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dielectric-Controlled Ultrafast Twisted Intramolecular Charge-Transfer VS trans to cis Isomerization Pathways in a Push-Pull Stilbene: Global Analysis Perspectives 推拉二苯乙烯中介电常数控制的超快双分子内电荷转移 VS 反式到顺式异构化途径：全局分析视角

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-09-17 DOI: 10.1002/cptc.202400182

Shaina Dhamija, Arijit K. De

引用次数: 0

A Novel Approach to the Structural Design of Dual-State Emission Luminogens by Combining Tetraphenylethylene with Anthracene via Dihydroisoxazole 通过二氢异噁唑将四苯乙炔与蒽结合起来设计双态发光剂结构的新方法

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-09-13 DOI: 10.1002/cptc.202400009

Wenjun Lu, Yingyi Zhao, Prof. Baiwang Sun

引用次数: 0

Fluorene vs. Spirobifluorene: Effect of the π-System on TADF Properties 芴与螺二芴：π-系统对 TADF 性能的影响