Broadband Light‐Harvesting Molecular Triads with High FRET Efficiency Based on the Coumarin–Rhodamine–BODIPY Platform

Abstract

Broadband capturing and FRET-based light-harvesting molecular triads, CRBs, based on the coumarin-rhodamine-BODIPY platform were rationally designed and synthesized. The absorption band of CRBs starts from blue-green to yellow-orange regions (330-610 nm), covering the strong radiation scope of sunlight. The peripheral coumarin and BODIPY chromophore energy could transfer to the central acceptor rhodamine by a one-step direct way. The energy of the coumarin moiety could also transfer to the BODIPY unit, subsequently transferring to the rhodamine core by two-step sequential ways. Both the efficiencies of the coumarin moiety and the BODIPY unit to the rhodamine core in CRBs, determined by two different ways, are very high.

Colorimetric and ratiometric fluorescent probe for hydrogen sulfide using a coumarin–pyronine FRET dyad with a large emission shift

“…The energy-transfer efficiency (F ET ) was determined by studying the uorescence quenching of the donor in the presence of the acceptor and calculated using the following equation: 41,42…”

Reversible Patterning Cross-Linked, Humidity-Responsive Polymer Films with Programmatically and Accurately Controlled Deformation

“…So far, more than 1000 coumarin derivatives have been studied. In addition to the biomedical activity, 31 roles in many promising applications such as drug delivery systems, 32−34 liquid crystal materials, 35,36 light and energy harvesting, 37 reversible photo-cross-linking, and photocleavage. 38,39 In this work, a series of novel humidity-responsive PCA− PAA−PEG films containing photosensitive coumarin pendant groups were synthesized.…”

“…Coumarin derivatives can form four types of dimers under UV irradiation (λ > 310 nm) via [2 + 2] cycloaddition and the dimers can be photocleaved upon UV irradiation at λ < 254 nm. Many polymers containing coumarin groups have been prepared and are expected to play important roles in many promising applications such as drug delivery systems, − liquid crystal materials, , light and energy harvesting, reversible photo-cross-linking, and photocleavage. , …”

Ready Access to Molecular Rotors Based on Boron Dipyrromethene Dyes-Coumarin Dyads Featuring Broadband Absorption

“…The design of molecules featuring two or more chromophoric units is of great interest [1][2][3][4]. One can envisage new applications of such systems by taking advantage of the interactions that may develop between the chromophoric units, i.e., energy transfer [5,6], or electron transfer pathways [7], enabling the design of light harvesters with broadband absorption and high pseudo-Stokes shifts [8][9][10][11], or photosensitizers for photovoltaic devices [12,13] mimicking the natural photosynthesis [14,15]. It is crucial to the design of multichromophoric systems to have flexible functionalization methods at one's disposal that are able to tailor the targeted analogues.…”