Molecular conformational twist-controlled wide fluorescence tuning and white light emission in a single fluorophore via halochromism

Abstract

Conformational differences-controlled fluorescence response of carbazole and triphenylamine appended cyano-pyridine donor–acceptor derivatives towards organic acids (TFA/PTSA).

A para-azaquinodimethane integrated quinoidal conjugated microporous polymer

“…Halochromism allows for reversible tuning of the optical and electronic properties of the molecules without causing structural alterations. [39][40][41][42] The basic lactam nitrogen in the p-azaquinodimethane can interact with the acid and modulate it's properties. Interestingly, when the polymer is exposed to TFA, the colour of the polymer turned black (Fig.…”

Carbazole fluorophore with an imidazole/thiazole unit: contrasting stimuli-induced fluorescence switching, water-sensing and deep-blue emission

“…[42][43][44] Incorporating an acid-responsive functional group with a uorophore allows fabrication of pH-controlled uorescenceswitching platforms. [45][46][47] Thus, exploring the role of structural change on the uorescence properties of organic molecules is a highly active research eld.…”

Triphenylamine–boron complexes: molecular thermometry and alkyl chain controlled molecular fluorescent liquids

“…8,11,45,46 Triphenylamine (TPA), a conformationally flexible propeller core, is utilized for obtaining smart fluorescent materials with wide fluorescence tuning and NIR emitting materials via structural tailoring. [47][48][49][50][51] A twisted TPA unit was used to derive TADF and TICT fluorescent molecules. 52 The integrating boron (B), which promotes strong electron acceptor character due to empty pp orbitals, with organic molecules produced efficient TADF and thermochromic molecules.…”