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Issue 39, 2019
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Encapsulation and characterisation of cationic benzo[a]phenoxazines in zeolite HY

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Abstract

Different cationic fluorochromophores were sucessfully encapsulated by ship-in-the-bottle synthesis into supercages of zeolite HY. The cationic fluorochromophores are N-(5-amino-10-methyl-9H-benzo[a]phenoxazin-9-ylidene)ethanaminium (1a), N-(10-methyl-5-(propylamino)-9H-benzo[a]phenoxazin-9-ylidene)ethanaminium (1b), N-(5-(isopentylamino)-10-methyl-9H-benzo[a]phenoxazin-9-ylidene)ethanaminium (1c) and N1-((5-(isopentylamino)-9H-benzo[a]phenoxazin-9-ylidene)propane-1,3-diaminium)monobromide (1d). The success of encapsulation was proved by TGA and N2 adsorption analysis showing that zeolite Y is an excellent host for the stabilization of these fluorochromophores. Photophysical characterisation of encapsulated fluorochromophores by UV-Visible absorption and fluorescence confirmed their location inside the zeolite supercages. Thus, it was possible to develop a new approach to synthesize materials possessing benzo[a]phenoxazinium derivatives, which are potential optical sensors with high stability, without the need for solution synthesis of fluorochromophores.

Graphical abstract: Encapsulation and characterisation of cationic benzo[a]phenoxazines in zeolite HY

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Supplementary files

Article information


Submitted
19 Jul 2019
Accepted
10 Sep 2019
First published
24 Sep 2019

New J. Chem., 2019,43, 15785-15792
Article type
Paper

Encapsulation and characterisation of cationic benzo[a]phenoxazines in zeolite HY

O. Guney, M. S. T. Gonçalves, A. M. Fonseca, O. S. G. P. Soares, M. F. R. Pereira and I. C. Neves, New J. Chem., 2019, 43, 15785
DOI: 10.1039/C9NJ03756J

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