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基于多刺激可编程荧光共振能量转移的RGB吸收天线用于比率温度、pH值和多种金属离子传感。

Multi-stimuli programmable FRET based RGB absorbing antennae towards ratiometric temperature, pH and multiple metal ion sensing.

作者信息

Rani Kavita, Sengupta Sanchita

机构信息

Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Punjab-140306 India

出版信息

Chem Sci. 2021 Nov 15;12(47):15533-15542. doi: 10.1039/d1sc05112a. eCollection 2021 Dec 8.

DOI:10.1039/d1sc05112a
PMID:35003582
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8654024/
Abstract

A red-green-blue (RGB) multichromophoric antenna 1 consisting of energy donors naphthalimides and perylenediimides and a central aza-BODIPY energy acceptor along with two subchromophoric red-blue (RB 6) and green-blue (GB 12) antennae was designed that showed efficient cascade Förster resonance energy transfer (FRET). RGB antenna 1 showed pronounced temperature-dependent emission behaviour where emission intensities in green and red channels could be tuned in opposite directions by temperature giving rise to unique ratiometric sensing with a temperature sensitivity of 0.4% °C. RGB antenna 1 showed reversible absorption modulation selectively in the blue region (RGB ↔ RG) upon acid/base addition giving rise to pH sensing behaviour. Furthermore, RGB antenna 1 was utilized to selectively sense metal ions such as Co and Fe through a FRET turn-off mechanism induced by a redox process at the aza-BODIPY site that resulted in the selective spectral modulation of the red band (, RGB → GB). Model antenna RB 6 showed white light emission with chromaticity coordinates (0.32, 0.33) on acid addition. Antennae 1, 6 and 12 also exhibited solution state electrochromic switching characterized by distinct colour changes upon changing the potential. Finally, antennae 1, 6 and 12 served as reversible fluorescent inks in PMMA/antenna blends whereby the emission colours could be switched or tuned using different stimuli such as acid vapour, temperature and metal ions.

摘要

设计了一种由能量供体萘二甲酰亚胺和苝二亚胺以及中心氮杂硼二吡咯能量受体组成的红-绿-蓝（RGB）多发色团天线1，以及两个亚发色团红-蓝（RB 6）和绿-蓝（GB 12）天线，该天线表现出高效的级联Förster共振能量转移（FRET）。RGB天线1表现出明显的温度依赖性发射行为，其中绿色和红色通道的发射强度可通过温度在相反方向上调节，从而产生独特的比率传感，温度灵敏度为0.4%/°C。RGB天线1在添加酸/碱后在蓝色区域（RGB ↔ RG）选择性地表现出可逆吸收调制，从而产生pH传感行为。此外，RGB天线1通过氮杂硼二吡咯位点的氧化还原过程诱导的FRET关闭机制，用于选择性地检测金属离子，如Co和Fe，这导致了红色带的选择性光谱调制（RGB → GB）。模型天线RB 6在添加酸时发出色坐标为（0.32, 0.33）的白光。天线1、6和12还表现出溶液态电致变色切换，其特征是在改变电位时颜色发生明显变化。最后，天线1、6和12在PMMA/天线共混物中用作可逆荧光油墨，其发射颜色可使用不同的刺激，如酸蒸汽、温度和金属离子进行切换或调节。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2903/8654024/eba604b9221d/d1sc05112a-f9.jpg
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