Synthesis and Evaluation of a Photochromic Surfactant for Organic Reactions in Aqueous Media
摘要:
A novel photochromic azobenzene-based surfactant was described for organic chemistry in water. The molecule 4-butylazobenzyl-4'-triazologlucuronic acid sodium salt thus synthesized can be isomerized from its trans to its cis form reversibly in solution by simple light irradiation. That property allowed the recyclability of a model acetylation reaction performed in the surfactant media, compared to the well-known, commercially available sodium dodecyl sulfate surfactant media.
超灵敏性是生化反应网络普遍存在的新兴特性。具有超灵敏性的合成反应网络的设计和构建一直具有挑战性,但将极大地扩展仿生材料的潜在特性。在此,我们利用通用的模块化策略利用光可逆地调节酶的活性,并展示了在加入可逆光开关抑制剂 (PI) 后,简单的失衡酶促系统如何产生超敏感性。利用发色团/弹头策略,蛋白酶 α-糜蛋白酶的 PI 被合成,这导致发现了抑制常数差异很大的抑制剂 ( K i) 用于不同的光异构体。微流体流动设置用于通过连续添加和去除试剂来研究失衡条件下的酶促反应。在用不同的光脉冲序列照射连续搅拌釜反应器后,即改变紫外线和蓝光照射的脉冲持续时间或频率,光异构体之间的可逆切换导致酶活性的超灵敏响应以及输入信号的频率过滤。这种通用的模块化策略能够对单个酶催化反应的动力学速率进行可逆和可调控制,并使酶与各种网络拓扑的可编程连接成为可能。
Reversible Photoswitchable Inhibitors Generate Ultrasensitivity in Out-of-Equilibrium Enzymatic Reactions
作者:Michael Teders、Aleksandr A. Pogodaev、Glenn Bojanov、Wilhelm T. S. Huck
DOI:10.1021/jacs.0c12956
日期:2021.4.21
ultrasensitivity arises in simple out-of-equilibrium enzymatic systems upon incorporation of reversible photoswitchable inhibitors (PIs). Utilizing a chromophore/warhead strategy, PIs of the protease α-chymotrypsin were synthesized, which led to the discovery of inhibitors with large differences in inhibition constants (Ki) for the different photoisomers. A microfluidic flow setup was used to study enzymatic
超灵敏性是生化反应网络普遍存在的新兴特性。具有超灵敏性的合成反应网络的设计和构建一直具有挑战性,但将极大地扩展仿生材料的潜在特性。在此,我们利用通用的模块化策略利用光可逆地调节酶的活性,并展示了在加入可逆光开关抑制剂 (PI) 后,简单的失衡酶促系统如何产生超敏感性。利用发色团/弹头策略,蛋白酶 α-糜蛋白酶的 PI 被合成,这导致发现了抑制常数差异很大的抑制剂 ( K i) 用于不同的光异构体。微流体流动设置用于通过连续添加和去除试剂来研究失衡条件下的酶促反应。在用不同的光脉冲序列照射连续搅拌釜反应器后,即改变紫外线和蓝光照射的脉冲持续时间或频率,光异构体之间的可逆切换导致酶活性的超灵敏响应以及输入信号的频率过滤。这种通用的模块化策略能够对单个酶催化反应的动力学速率进行可逆和可调控制,并使酶与各种网络拓扑的可编程连接成为可能。
Lipid-independent control of endothelial and neuronal TRPC3 channels by light
作者:Oleksandra Tiapko、Niroj Shrestha、Sonja Lindinger、Gema Guedes de la Cruz、Annarita Graziani、Christiane Klec、Carmen Butorac、Wolfgang. F. Graier、Helmut Kubista、Marc Freichel、Lutz Birnbaumer、Christoph Romanin、Toma Glasnov、Klaus Groschner
DOI:10.1039/c8sc05536j
日期:——
A new photochromic ligand enables high precision control over native TRPC channels.
一种新的光致变色配体使得对天然TRPC通道进行高精度控制成为可能。
Liquid Crystalline Properties of Substituted Azo- and Azoxy-benzenes. I
作者:Kei Murase、Haruaki Watanabe
DOI:10.1246/bcsj.46.3142
日期:1973.10
In order to obtain low-temperature mesomorphic materials, thirty-two p-alkyl-p′-alkoxy-azo- and -azoxybenzenes have been synthesized. The former have been made by the condensation of p-n-alkylnitrosobenzenes and p-n-alkoxyanilines, and the latter, by the oxidation of the former. Twenty-nine of the compounds show nematic behavior. In the majority of cases, the nematic temperature range of the azoxy compounds, which have been considered to consist of two isomers synthesized simultaneously, is appreciably wide.
Selectivity of attack in nucleophilic alkylation of nitroarenes with Grignard reagents. Reactivity of some substituted nitrobenzenes and nitronaphthalenes
作者:Giuseppe Bartoli、Marcella Bosco、Alfonso Melandri、Andrea C. Boicelli
DOI:10.1021/jo01327a009
日期:1979.6
Wide Temperature Range Azobenzene Nematic and Smectic LC Materials
作者:U. Hrozhyk、S. Serak、N. Tabiryan、T. J. Bunning
DOI:10.1080/15421400600655733
日期:2006.9
We have developed a series of azobenzene liquid crystals (azo LC) compounds, both multicomponent as well as single component, that possess room temperature nematic and smectic phases. Some of these materials have a wide mesophase temperature range which makes them useful for a variety of practical applications. Two main strategies were used for controlling the temperature range of these mesogenic azo LC materials: 1) chemical modification of azobenzene molecules with different terminal pendants; and 2) development of multicomponent compositions. These materials were highly photosensitive exhibiting nonlinear refraction and transmission at nanowatt/microwatt power levels. Physical, electro- and nonlinear-optical parameters of many of these materials have been characterized in detail.