Thermochimica Acta, volume 589, pages 31-36
Composition and thermal stability of bis(dipyrrolylmethenato)zinc(II) crystal solvates with N,N-dimethylformamide
Publication type: Journal Article
Publication date: 2014-08-01
Journal:
Thermochimica Acta
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor: 3.5
ISSN: 00406031, 1872762X
Physical and Theoretical Chemistry
Condensed Matter Physics
Instrumentation
Abstract
Fluorescence of zinc(II) bis (dipyrrolylmethenates) [Zn 2 L 2 ] is very sensitive to the medium polarity. Fluorescence quantum yield ( φ ) of [Zn 2 L 2 ] reaches 0.99 in nonpolar media and close to zero in the electron donor solvents (amines, alcohols and other). Fluorescence quenching may be caused by the additional coordination of the electron donor molecules on the zinc atoms with formation of stable supramolecular structures [Zn 2 L 2 (Solv) n ]. For the confirming this assumption, the samples of the crystal solvates of 2,2′-, 2,3′- and 3,3′- bis (dipyrrolylmethenato)zinc(II) with N,N -dimethylformamide were obtained by slow crystallization. Spectroscopic studies showed that the quantum yield of crystal solvates in cyclohexane solutions is noticeably lower than φ for corresponding complexes [Zn 2 L 2 ]. The thermal dissociation processes of crystal solvates in an argon atmosphere have been investigated. It is shown that helicates of the zinc(II) with decamethylsubstituted 2,2′-, 2,3′- and 3,3′- bis (dipyrrolylmethenes) form with DMF stable supramolecular complexes of the composition [Zn 2 L 2 (DMF) 2 ]. Crystal solvates [Zn 2 L 2 (DMF) 2 ] are stable up to a temperature below ∼100 °C in an inert argon atmosphere and the values of the enthalpies of their thermal destruction process are 88–143 kJ/mol. The obtained results are of interest for the development on the basis of [Zn 2 L 2 ] of the fluorescent sensors of the electron donor molecules.
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- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Guseva G. B. et al. Composition and thermal stability of bis(dipyrrolylmethenato)zinc(II) crystal solvates with N,N-dimethylformamide // Thermochimica Acta. 2014. Vol. 589. pp. 31-36.
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Guseva G. B., Antinа E. V., Ksenofontov A. A., Barannikov V. P., Vyugin A. I. Composition and thermal stability of bis(dipyrrolylmethenato)zinc(II) crystal solvates with N,N-dimethylformamide // Thermochimica Acta. 2014. Vol. 589. pp. 31-36.
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TY - JOUR
DO - 10.1016/j.tca.2014.05.007
UR - https://doi.org/10.1016%2Fj.tca.2014.05.007
TI - Composition and thermal stability of bis(dipyrrolylmethenato)zinc(II) crystal solvates with N,N-dimethylformamide
T2 - Thermochimica Acta
AU - Antinа, E V
AU - Vyugin, A I
AU - Guseva, Galina B
AU - Ksenofontov, Alexander A
AU - Barannikov, Vladimir P.
PY - 2014
DA - 2014/08/01 00:00:00
PB - Elsevier
SP - 31-36
VL - 589
SN - 0040-6031
SN - 1872-762X
ER -
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@article{2014_Guseva,
author = {E V Antinа and A I Vyugin and Galina B Guseva and Alexander A Ksenofontov and Vladimir P. Barannikov},
title = {Composition and thermal stability of bis(dipyrrolylmethenato)zinc(II) crystal solvates with N,N-dimethylformamide},
journal = {Thermochimica Acta},
year = {2014},
volume = {589},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016%2Fj.tca.2014.05.007},
pages = {31--36},
doi = {10.1016/j.tca.2014.05.007}
}