Effects of alkyl chain length and anion on the optical and electrochemical properties of AIE-active α-cyanostilbene-containing triphenylamine derivatives

2020 ◽  
Vol 8 (22) ◽  
pp. 7454-7462
Author(s):  
Sin-Yu Chen ◽  
Min-Hao Pai ◽  
Guey-Sheng Liou
Keyword(s):  
Electrochemical Properties ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Redox Active ◽  
Chain Lengths

A series of AIE-active and redox-active α-cyanostilbene-containing triphenylamine derivatives with different alkyl chain lengths and anions were successfully synthesized, and their optical, photoluminescent and electrochromic behaviors were investigated.

Electronic and electrochemical properties as well as flowerlike supramolecular assemblies of fulleropyrrolidines bearing ester substituents with different alkyl chain lengths

RSC Advances ◽  
2014 ◽  
Vol 4 (104) ◽  
pp. 60342-60348 ◽  
Author(s):  
Xuan Zhang ◽  
Xu-Dong Li ◽  
Li-Xia Ma ◽  
Bei Zhang
Keyword(s):  
Electrochemical Properties ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Supramolecular Assemblies ◽  
Bilayer Structure ◽  
Lamellar Structures ◽  
Supramolecular Architectures ◽  
Chain Lengths

Flowerlike supramolecular architectures, obtained from a series of energetically PCBM-like and high C60 content (76–79%) fulleropyrrolidines FP1–FP4, were lamellar structures with alkyl chain length dependent thickness of a bilayer structure.

The transfection efficiency of calix[4]arene-based lipids: the role of the alkyl chain length

2015 ◽  
Vol 3 (2) ◽  
pp. 317-322 ◽  
Author(s):  
Shinichi Mochizuki ◽  
Koichi Nishina ◽  
Shota Fujii ◽  
Kazuo Sakurai
Keyword(s):  
Chain Length ◽  
Plasmid Dna ◽  
Alkyl Chain ◽  
Transfection Efficiency ◽  
Alkyl Chain Length ◽  
Chain Lengths

Calix[4]arene-based lipids with the C6 alkyl chain length exhibited the highest transfection efficiency among all lipoplexes comprising the lipids with different alkyl chain lengths and plasmid DNA.

Correlating alkyl chain length with defect passivation efficacy in perovskite solar cells

2020 ◽  
Vol 56 (37) ◽  
pp. 5006-5009 ◽  
Author(s):  
Wenhuai Feng ◽  
Chengxi Zhang ◽  
Jun-Xing Zhong ◽  
Liming Ding ◽  
Wu-Qiang Wu
Keyword(s):  
Solar Cells ◽  
Chain Length ◽  
Alkyl Chain ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Alkyl Chain Length ◽  
Defect Passivation ◽  
Amine Ligands ◽  
Chain Lengths

Anchoring of amine ligands with different alkyl chain lengths on perovskites mitigates non-radiative charge recombination in perovskite solar cells.

Solubility of Cellulose in Binary Mixtures of 1-Alkyl-3-methylimidazolium Acetate and Dimethyl Sulfoxide: Influence of Alkyl Chain Length in the Cation

2019 ◽  
Vol 72 (9) ◽  
pp. 669
Author(s):  
Yuta Tomimatsu ◽  
Yukihiro Yoshimura ◽  
Akio Shimizu
Keyword(s):  
Binary System ◽  
Chain Length ◽  
Mole Fraction ◽  
Binary Systems ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Anionic Species ◽  
Hydrogen Bond Basicity ◽  
A Chain ◽  
Chain Lengths

The influence of alkyl chain length of cations on cellulose solubility in a neat imidazolium (MIM)-based ionic liquid (IL) [CnMIM][OAc] and [CnMIM][OAc]–DMSO binary system (n=0–6) was investigated. The correlation between cellulose solubility and Kamlet–Taft hydrogen bond basicity (β) was also examined. Cellulose solubility (g per mol IL) in neat [CnMIM][OAc] increased as the cation alkyl chain length decreased from 6 to 2. However, alkyl chain lengths of 1 and 0 resulted in extremely poor cellulose solubility, indicating that a chain length of 2 was optimal for dissolution of cellulose in the system. Cellulose solubility in the [CnMIM][OAc]–DMSO binary system (n=1–6) was greater than that in neat IL, with maximum solubility occurring at an IL mole fraction of ~0.2. Maximum cellulose solubility in the [CnMIM][OAc]–DMSO binary system was slightly better at even alkyl chain lengths (n=2, 4, or 6) than at odd chain lengths (n=1, 3, or 5), with the best solubility at n=4. More interestingly, maximum cellulose solubility and specific IL mole fraction in the IL-DMSO binary system were related with the β values of neat ILs, even with ILs containing different anionic species or cation alkyl chain lengths. This indicates that solubility information in IL-DMSO binary systems is influenced by the characteristics of neat ILs.

scholarly journals Substituent-Adjusted Electrochromic Behavior of Symmetric Viologens

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1702
Author(s):  
Qun Zhang ◽  
Li Yuan ◽  
Fanglan Guan ◽  
Xin Li ◽  
Rui Wang ◽  
...  
Keyword(s):  
Spatial Structure ◽  
Response Time ◽  
Electrochemical Properties ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Redox Activity ◽  
Optical Contrast ◽  
Electrochromic Material ◽  
Bleaching Response

As a promising electrochromic material, viologens have attracted increasing attention due to their high redox activity and adjustable electrochromic capability. In order to investigate the effect of alkyl substituents on electrochromic behavior, four alkyl-substituted viologens and a benzyl-substituted viologen were synthesized, namely 1,1′-dioctyl-4,4′-bipyridinium dibromide (OV), 1,1′-didekyl-4,4′-bipyridinium dibromide (DeV), 1,1′-didodecyl-4,4′-bipyridinium dibromide (DoV), 1,1′-dihexadecyl-4,4′-bipyridinium dibromide (HV), and 1,1′-dibenzyl-4,4′-bipyridinium dibromide (BV). The different photophysical and electrochemical properties of these viologens were attributed to their deviation in spatial structure caused by different substituents. Compared with benzyl-substituted BV, a slight blueshift occurred for the absorption peaks of alkyl-substituted viologens from 262 to 257 nm with the increase in alkyl chain length. Moreover, the first redox couple increased positively, and the dimerization of the compound decreased gradually, accompanied by the decrease in optical contrast and distinct chromatic difference. A comparison of chromatic and optical contrasts indicated that OV had the longest coloring response time (RTc), while it was shortest for HV. The bleaching response time (RTb) of viologen films gradually decreased with the alkyl chain length, and the OV film had the shortest RTb. Furthermore, when increasing the length of the alkyl chain, the cycling stabilities of alkyl viologens increased gradually. In addition, the OV film exhibited the best contrast after 200 continuous cycles.

scholarly journals Studies of PET nonwovens modified by novel antimicrobials configured with both N-halamine and dual quaternary ammonium with different alkyl chain length

RSC Advances ◽  
2019 ◽  
Vol 9 (13) ◽  
pp. 7257-7265 ◽  
Author(s):  
Hsiu-Wen Chien ◽  
Ying-Yuan Chen ◽  
Yen-Lun Chen ◽  
Chi-Hui Cheng ◽  
Jui-Che Lin
Keyword(s):  
Chain Length ◽  
Quaternary Ammonium ◽  
Antimicrobial Agents ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Chain Lengths

This work describes the synthesis of novel antimicrobial agents consisting of N-halamine and dual quaternary ammonium with different alkyl chain lengths and their antimicrobial applications for PET nonwovens.

scholarly journals Controlled Growth of ZnSe Nanocrystals by Tuning Reactivity and Amount of Zinc Precursor

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Lai-Jun Zhang ◽  
Fa-Yun Chen ◽  
Ji-Zao Tong ◽  
Guang-Da Chen ◽  
Hai-Jin Huang ◽  
...  
Keyword(s):  
Optical Property ◽  
Chain Length ◽  
Alkyl Chain ◽  
Zinc Stearate ◽  
Alkyl Chain Length ◽  
Controlled Growth ◽  
Visible Absorption ◽  
Chain Lengths ◽  
Excellent Optical Property ◽  
Znse Nanocrystals

Zinc selenide (ZnSe) nanocrystals were synthesized via a phosphine-free route using the highly reactive alkylamine-H2Se complex as selenium precursor and zinc precursors with different reactivity. The reactivity of zinc precursor was tuned by using three kinds of zinc carboxylates with different alkyl chain lengths, including zinc acetate, zinc nonanoate, and zinc stearate. The effect of the reactivity and the amount of zinc precursor on nucleation and growth of ZnSe nanocrystals were investigated by ultraviolet-visible absorption and photoluminescence spectra. Result indicates that the growth and optical property of the resulting ZnSe nanocrystals are strongly dependent on the alkyl chain length and the amount of the zinc carboxylates and both shorter alkyl chain length, and more amount of zinc carboxylate will lead to faster growth of ZnSe nanocrystals. This allows that the controlled growth and excellent optical property of high-quality ZnSe nanocrystals can be achieved by combining the different reactivity and the used amount of zinc precursor, such as by using stoichiometric and reactive Zn precursor and Se precursor or by using larger amount of more unreactive Zn precursor relative to the highly reactive alkylamine-H2Se complex precursor.

Effect of alkyl chain length on piezochromic luminescence of iridium(iii)-based phosphors adopting 2-phenyl-1H-benzoimidazole type ligands

2014 ◽  
Vol 2 (36) ◽  
pp. 7648-7655 ◽  
Author(s):  
Yi Han ◽  
Hong-Tao Cao ◽  
Hai-Zhu Sun ◽  
Yong Wu ◽  
Guo-Gang Shan ◽  
...  
Keyword(s):  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Chain Lengths

The effect ofN-alkyl chain lengths on the mechanochromism of Ir(iii)-based phosphors is studied. Reversible switching of the emission colour is achieved by using the Ir(iii) material as a medium.

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