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Multiple Emissions from 1,3‐Diphenyl‐5‐pyrenyl‐2‐pyrazoline Nanoparticles: Evolution from Molecular to Nanoscale to Bulk Materials
Author(s) -
Fu Hongbing,
Loo B. H.,
Xiao Debao,
Xie Ruiming,
Ji Xuehai,
Yao Jiannian,
Zhang Baowen,
Zhang Lianqi
Publication year - 2002
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20020315)41:6<962::aid-anie962>3.0.co;2-9
Subject(s) - nanoscopic scale , nanoparticle , pyrazoline , materials science , nanotechnology , chemical engineering , chemistry , organic chemistry , engineering
Tunable, multiple emission is exhibited by nanoparticles of 1,3‐diphenyl‐5‐pyrenyl‐2‐pyrazoline (DPP; see picture), which ranges from near‐UV to green. Tuning could be effected by alteration of either the excitation wavelength or the nanoparticle size. In contrast, DPP in dilute solution only showed the emission characteristics of the pyrene chromophore. In bulk crystals, only the emission characteristics of the pyrazoline chromophore were exhibited.