Publication Date

6-2018

Department

Ames Laboratory; Materials Science and Engineering

Campus Units

Materials Science and Engineering, Ames Laboratory

Report Number

IS-J 9692

DOI

10.1107/S2053229618005272

Journal Title

Acta Crystallographica Section C

Volume Number

74

Issue Number

6

First Page

653

Last Page

658

Abstract

A microcrystalline carboxyl-functionalized imidazolium chloride, namely 1-carboxymethyl-3-ethylimidazolium chloride, C7H11N2O2+center dot Cl-, has been synthesized and characterized by elemental analysis, attenuated total reflectance Fourier transform IR spectroscopy (ATR-FT-IR), single-crystal X-ray diffraction, thermal analysis (TGA/DSC), and photoluminescence spectroscopy. In the crystal structure, cations and anions are linked by C-H center dot center dot center dot Cl and C-H center dot center dot center dot O hydrogen bonds to create a helix along the [010] direction. Adjacent helical chains are further interconnected through O-H center dot center dot center dot Cl and C-H center dot center dot center dot O hydrogen bonds to form a (10(1) over bar) layer. Finally, neighboring layers are joined together via C-H center dot center dot center dot Cl contacts to generate a three-dimensional supramolecular architecture. Thermal analyses reveal that the compound melts at 449.7 K and is stable up to 560.0 K under a dynamic air atmosphere. Photoluminescence measurements show that the compound exhibits a blue fluorescence and a green phosphorescence associated with spin-allowed ((1)pi <- (1)pi*) and spin-forbidden ((1)pi <- (3)pi*) transitions, respectively. The average luminescence lifetime was determined to be 1.40 ns for the short-lived ((1)pi <- (1)pi*) transition and 105 ms for the long-lived ((1)pi <- (3)pi*) transition.

Language

en

Department of Energy Subject Categories

36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Publisher

Iowa State University Digital Repository, Ames IA (United States)

Available for download on Saturday, June 01, 2019

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