Photoregulation of α-Chymotrypsin Activity by Spiropyran-Based Inhibitors in Solution and Attached to an Optical Fiber
作者:Xiaozhou Zhang、Sabrina Heng、Andrew. D. Abell
DOI:10.1002/chem.201501488
日期:2015.7.20
excellent stability and photoswitching in solution and was attached to the surface of a MOF. The SP isomer of Weinreb amide 2 d is a competitive reversible inhibitor in solution and also on fiber, while the corresponding MC isomer was significantly less active in both media. The ability of this new class of spiropyran‐based protease inhibitor to modulate enzyme activity on a MOF paves the way for sensing
此处报道了一种新型基于螺吡喃的蛋白酶抑制剂的合成和表征,在紫外线和可见光照射下,它们可以分别在活性螺吡喃(SP)异构体和活性较弱的花菁(MC)异构体之间可逆地光切换在溶液中以及在微结构光纤(MOF)的表面上。该系列中最有效的抑制剂(SP - 3b)具有一个基于C末端苯丙氨酰基的α-酮酸酯基团,并以115 n M的K i抑制α-胰凝乳蛋白酶。包含C端Weinreb酰胺(SP-2 d)在溶液中表现出出色的稳定性和光开关性能,并附着在MOF的表面上。Weinreb酰胺2 d的SP异构体在溶液中以及在纤维上都是竞争性可逆抑制剂,而相应的MC异构体在两种介质中的活性均显着降低。新型基于螺吡喃的蛋白酶抑制剂在MOF上调节酶活性的能力为传感应用铺平了道路。
Nanoliter-scale, regenerable ion sensor: sensing with a surface functionalized microstructured optical fibre
作者:Sabrina Heng、Mai-Chi Nguyen、Roman Kostecki、Tanya M. Monro、Andrew D. Abell
DOI:10.1039/c3ra40321a
日期:——
The first nanoliter-scale regenerable ion sensor based on a microstructured optical fibre (MOF) is reported. The air holes of the MOF are functionalized with a monoazacrown bearing spiropyran to give a switchable sensor that detects lithium ions down to 100 nM in nanoliter-scale volumes. Ion binding is turned on and off on upon irradiation with light, with the sensor being unaffected by multiple rounds of photoswitching. Unbound ions are flushed from the fibre in the ‘off’ state to allow the sensor to be reused. The integration of an ionophore into the sensor paves the way for the development of highly specific light-based sensing platforms that are readily adaptable to sense a particular ion simply by altering the ionophore design.
Blue light emitting fluorophore for the effective detection of cyanide ion and electronic test kit development for real time measurement
作者:Ramalingam Manivannan、Young-A Son
DOI:10.1016/j.dyepig.2022.110941
日期:2023.2
effective detection of cyanideion. The probe holding diethylamino coumarin unit as a donor unit and indolium as an acceptor unit that is connected by a π-conjugation. The cyanideion sensing ability of the probe has been monitored by UV–visible and fluorescence measurement. The probe exhibits a vivid color change from deep blue to pale yellow before and after sensing cyanideion. The color change confirmed
[EN] WATER SOLUBLE NOVEL CYANINE FLUOROPHORE WITH TUNABLE PROPERTIES BETWEEN NEAR IR AND SWIR REGION FOR IN VIVO IMAGING<br/>[FR] NOUVEAU FLUOROPHORE CYANINE SOLUBLE DANS L'EAU DOTÉ DE PROPRIÉTÉS AJUSTABLES ENTRE DES RÉGIONS PROCHE IR ET IRCL, DESTINÉ À L'IMAGERIE IN VIVO
申请人:US HEALTH
公开号:WO2020041743A8
公开(公告)日:2020-03-19
Crowned spiropyran fluoroionophores with a carboxyl moiety for the selective detection of lithium ions
作者:D. B. Stubing、S. Heng、A. D. Abell
DOI:10.1039/c6ob00468g
日期:——
The absorbance and fluorescence spectra of carboxylated spiropyrans containing methyl-1-aza-12-crown-4, methyl-1-aza-15-crown-5, methyl-1-aza-18-crown-6 moieties are compared. Characteristic changes in spectra after addition of the alkali metal salts of Li+, Na+, K+ and Cs+ were observed. Chromism induced by the binding of the metal cations was observed as an increase in absorbance and fluorescence