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Published on: October 9, 2012
Rigid binaphthyl disulfonate directs ligand-exchange-driven assembly of CsPbI3 quantum dots into nanowires
Qi Cai1,2, Yixiong Ji1, Yang Peng1
1Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, 830011, China. wangjh@ms.xjb.ac.cn.
None:
Post-synthetic ligand exchange with rigid binaphthyl disulfonate (R-BDA) selectively drives CsPbI3 quantum dots into nanowires. Control experiments using R-BDA and S-BDA show that ligand chirality is not a decisive factor. Comparative ligand screening and a rigid binaphthyl diamine control indicate that, within the ligand set examined, one-dimensional assembly depends on the cooperative combination of rigid binaphthyl geometry and ditopic sulfonate anchoring chemistry, rather than on any single structural factor alone.
