Symmetric Meso-Chloro-Substituted Pentamethine Cyanine Dyes Containing Benzothiazolyl/Benzoselenazolyl Chromophores Novel Synthetic Approach and Studies on Photophysical Properties upon Interaction with bio-Objects
A series of symmetric pentamethine cyaninedyesderivedfrom various N-substituted benzothiazolium/benzoselenazolium salts, and a conjugated bis-aniline derivative containing a chlorine atom at meso-position with respect to the polymethine chain, were synthesized using a novel improved synthetic approach under mild conditions at room temperature. The reaction procedure was held by grinding the starting
[EN] PROCESS FOR DYE PRODUCTION<br/>[FR] PROCÉDÉ POUR LA PRODUCTION DE COLORANT
申请人:UNIV CENTRAL LANCASHIRE
公开号:WO2013114115A1
公开(公告)日:2013-08-08
The present invention relates to a process for the production of certain compounds, especially dye compounds defined in general by Formula I: The invention provides a one-step method in which a compound of Formula II or a reactive intermediate derived in situ therefrom is reacted in situ with a compound of Formula III (optionally in the presence of a compound of Formula IV) to produce compounds of Formula I in excellent yield, and in a manner which avoids undesirable by- product formation.
In this report, we wish to present the rational design, synthesis, and study of optical characteristics of near-infrared (NIR) molecular probes emitting over 800 nm. The title pH sensing platforms consist of a piperazine moiety serving as a hydronium ion receptor, coupled with a rigidified symmetric heptamethine backbone. The spectrally fine-tuned response of the fluorophores was studied in both organic
在此报告中,我们希望提出合理的设计,合成方法,并研究发射800 nm以上的近红外(NIR)分子探针的光学特性。标题pH感测平台由充当水合氢离子受体的哌嗪部分,以及刚性的对称七甲胺骨架组成。利用结合的UV-Vis和稳态荧光技术,在有机溶剂和缓冲水溶液中研究了荧光团的光谱微调响应。并行地,采用计算方法和光学光谱法来归因于氨基取代的庚二甲胺的光谱行为的起源。在本文中,我们还研究了不同取代的哌嗪对NIR花青染料光谱特性的晕色效应。在酸性条件下 哌嗪部分的质子化促进了吸收光谱的逐渐红移。中性和质子化形式之间的Δλ与应用于质子受体的修饰间接相关。计算出的p发现K a值(5.13-7.06)取决于染料的化学结构。在新合成的染料与已报道的哌嗪部分的p K a之间建立了良好的线性相关性。由于可以容易地基于p K a取代哌嗪衍生物的数据库来设计具有预测的pH响应的发色团,因此该方面允许当前的简便策略的未来扩展
作者:Lukas Biesen、Nithiya Nirmalananthan‐Budau、Katrin Hoffmann、Ute Resch‐Genger、Thomas J. J. Müller
DOI:10.1002/anie.201916396
日期:2020.6.15
N ‐Benzyl aroyl‐S ,N ‐ketene acetals can be readily synthesized by condensation of aroyl chlorides and N ‐benzyl 2‐methyl benzothiazolium salts in good to excellent yields, yielding a library of 35 chromophores with bright solid‐state emission and aggregation‐induced emission characteristics. Varying the substituent from electron‐donating to electron‐withdrawing enables the tuning of the solid‐state