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A Nonarchetypal 5,6‐Dihydro‐2 H ‐pyrano[3,2‐ g ]indolizine‐Based Solution‐Solid Dual Emissive AIEgen with Multicolor Tunability
Author(s) -
Raghuvanshi Ashutosh,
Jha Ajay Kumar,
Sharma Ashutosh,
Umar Shahida,
Mishra Shachi,
Kant Ruchir,
Goel Atul
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201605844
Subject(s) - indolizine , intramolecular force , solid state , ring (chemistry) , block (permutation group theory) , dual (grammatical number) , chemistry , materials science , photochemistry , physics , stereochemistry , combinatorics , mathematics , organic chemistry , art , literature
Screening of a chemical library of pyranones and their ring transformed fluorophores led to the discovery of a novel 5,6‐dihydro‐2 H ‐pyrano[3,2‐ g ]indolizine ( DPI ) class of the luminogen DPI 7, which exhibited unique solution–solid dual emission (SSDE) behavior with an emission color shift from bright‐green in solution to a strong red emission in the solid state. The AIE mechanism of these luminogens revealed a well‐defined set of noncovalent interactions (CH⋅⋅⋅O and CH⋅⋅⋅N) that block the motion of C 2 ‐flexure leading to restriction of intramolecular vibrations (RIV) in the solid state. DPI ‐ 7 is the first example of solution–solid dual emissive RIV‐based AIEgen, which has great potential both in biomedical imaging and optoelectronic fields.