Issue 23, 2022

Synthesis of porous microplatelets of α form anhydrous guanine in DMSO/water mixed solvents

Abstract

Guanine crystals have been utilized as optical systems such as tunable structural colors, diffusive light scatters, broad-band and narrow-band reflectors, imaging mirrors, and polarization sensitive reflectors in many organisms. It is still a big challenge to realize the controlled synthesis of guanine crystals with particular polymorphs and morphologies in the laboratory. In this work, microplatelets of α form anhydrous guanine (α-AG) exposing the (100) face were obtained under mild conditions in DMSO/water mixed solvents with polyvinylpyrrolidone K30 (PVP) as an additive. The obtained α-AG microplatelets are 2.7 ± 0.9 μm in length, 0.48 ± 0.16 μm in width and about 90 nm in thickness. PVP is supposed to be adsorbed on the (100) face of α-AG, resulting in the formation of a plate-like morphology. The α-AG microplatelets have a porous feature, which was supposed to be formed during the dissolution of co-precipitated Na2SO4 nanoparticles together with the guanine crystals. The delicate control on the polymorph and morphology of the guanine crystals may shed light on the controlled crystallization of organic crystals with unique optical properties.

Graphical abstract: Synthesis of porous microplatelets of α form anhydrous guanine in DMSO/water mixed solvents

Supplementary files

Article information

Article type
Paper
Submitted
24 Dec 2021
Accepted
28 Apr 2022
First published
04 May 2022

CrystEngComm, 2022,24, 4215-4223

Synthesis of porous microplatelets of α form anhydrous guanine in DMSO/water mixed solvents

F. Chen, Y. Ma and L. Qi, CrystEngComm, 2022, 24, 4215 DOI: 10.1039/D1CE01709H

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