Crystal habit modification of Cu(ii) isonicotinate–N-oxide complexes using gel phase crystallisation

Ghosh, Dipankar; Ferfolja, Katja; Drabavičius, Žygimantas; Steed, Jonathan W.; Damodaran, Krishna K.

doi:10.1039/c8nj05036h

Crystal habit modification of Cu(ii) isonicotinate–N-oxide complexes using gel phase crystallisation

Ghosh, Dipankar; Ferfolja, Katja; Drabavičius, Žygimantas; Steed, Jonathan W.; Damodaran, Krishna K.

Authors

Dipankar Ghosh

Katja Ferfolja

Žygimantas Drabavičius

Professor Jonathan Steed jon.steed@durham.ac.uk
Professor

Krishna K. Damodaran

Abstract

We report the crystallisation of three forms of the copper(II) isonicotinate–N-oxide complex and their phase interconversion via solvent-mediated crystal-to-crystal transformation. The different forms of the copper complex have been isolated and characterised by single crystal X-ray diffraction. Gel phase crystallisation performed in hydrogels, low molecular weight gels and gels of a tailored gelator showed crystal habit modification. Crystallisation in aqueous ethanol resulted in the concomitant formation of blue (form-I) and green (form-II/IV) crystals while the use of a low molecular weight gel resulted in the selective crystallization of the blue form-I under identical conditions. Comparison of the gel phase and the solution state crystallisation in various solvent compositions reveals that the blue form-I is the thermodynamically stable form under ambient conditions.

Citation

Ghosh, D., Ferfolja, K., Drabavičius, Ž., Steed, J. W., & Damodaran, K. K. (2018). Crystal habit modification of Cu(ii) isonicotinate–N-oxide complexes using gel phase crystallisation. New Journal of Chemistry, 42(24), 19963-19970. https://doi.org/10.1039/c8nj05036h

Journal Article Type	Article
Acceptance Date	Nov 1, 2018
Online Publication Date	Nov 2, 2018
Publication Date	Dec 21, 2018
Deposit Date	Dec 14, 2018
Publicly Available Date	Nov 1, 2019
Journal	New Journal of Chemistry
Print ISSN	1144-0546
Electronic ISSN	1369-9261
Publisher	Royal Society of Chemistry
Peer Reviewed	Peer Reviewed
Volume	42
Issue	24
Pages	19963-19970
DOI	https://doi.org/10.1039/c8nj05036h