Tunable Linear and Nonlinear Optical Properties from Room Temperature Phosphorescent Cyclic Triimidazole-Pyrene Bio-Probe.
bioimaging
phosphorescence
photophysics
polymorphs
time-resolved spectroscopy
Journal
Chemistry (Weinheim an der Bergstrasse, Germany)
ISSN: 1521-3765
Titre abrégé: Chemistry
Pays: Germany
ID NLM: 9513783
Informations de publication
Date de publication:
01 Dec 2021
01 Dec 2021
Historique:
received:
04
08
2021
pubmed:
12
10
2021
medline:
15
12
2021
entrez:
11
10
2021
Statut:
ppublish
Résumé
Organic materials with multiple emissions tunable by external stimuli represent a great challenge. TTPyr, crystallizing in different polymorphs, shows a very rich photophyisics comprising excitation-dependent fluorescence and phosphorescence at ambient conditions, and mechanochromic and thermochromic behavior. Transformation among the different species has been followed by thermal and X-ray diffraction analyses and the emissive features interpreted through structural results and DFT/TDDFT calculations. Particularly intriguing is the polymorph TTPyr(HT), serendipitously obtained at high temperature but stable also at room temperature, whose non-centrosymmetric structure guarantees an SHG efficiency 10 times higher than that of standard urea. Its crystal packing, where only the TT units are strongly rigidified by π-π stacking interactions while the Pyr moieties possess partial conformational freedom, is responsible for the observed dual fluorescence. The potentialities of TTPyr for bioimaging have been successfully established.
Identifiants
pubmed: 34634149
doi: 10.1002/chem.202102839
pmc: PMC9297885
doi:
Substances chimiques
Pyrenes
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
16690-16700Subventions
Organisme : fondazione cariplo
ID : Regione Lombardia-Fondazione Cariplo joint SmartMatLab Project
Informations de copyright
© 2021 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH.
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