Alkynylgold(I) C3 -Chiral Concave Complexes: Aggregation and Luminescence.
Chemistry
; 28(7): e202103759, 2022 Feb 01.
Article
em En
| MEDLINE
| ID: mdl-34962011
ABSTRACT
Chiral gold(I) acetylide trinuclear complexes 1-3 based on the cyclotribenzylene platform and terminal PR3 ligands (R=Ph, Et, and Cy, respectively), were characterized and their light emission studied. They exhibited long-lived blue phosphorescence in CHCl3 and a weak fluorescence in the UV. In MeOH/CHCl3 mixtures of >11 volume ratio, 1 and 2 exhibited a new emission band at ca. 540â
nm that developed at the expense of the UV emission. DLS studies demonstrated the presence of molecular aggregates of Ø 30-80â
nm. The green emission observed in MeOH-rich solvent mixtures was therefore induced by aggregation, and could originate from Auâ
â
â
Au interactions. The AIE spectrum of 3 was observed only in solutions containing 99 % of MeOH, and correlated with its solid state emission. The AIE profiles of the enantiomers of 1 differed from that of rac-1, suggesting that the latter is a true racemate.
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MEDLINE
Assunto principal:
Luminescência
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Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article