Controlled Modulation of the Structure and Luminescence Properties of Zero-Dimensional Manganese Halide Hybrids through Structure-Directing Metal-Ion (Cd2+ and Zn2+) Centers

Kumar Das, Deep and Bakthavatsalam, Rangarajan and Raavi, Sai Santosh Kumar and et al, . (2022) Controlled Modulation of the Structure and Luminescence Properties of Zero-Dimensional Manganese Halide Hybrids through Structure-Directing Metal-Ion (Cd2+ and Zn2+) Centers. Inorganic Chemistry, 61 (13). pp. 5363-5372. ISSN 0020-1669

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Abstract

Zero-dimensional (0D) metal halide hybrids with high exciton binding energy are excellent materials for lighting applications. Controlling/modulating the structure of the constituent metal halide units allows tunability of their photoluminescence properties. 0D manganese halide hybrids are currently attracting research efforts in lighting applications due to their eco-friendly and strong emission. However, structural transformation-induced tunability of their photophysical properties has rarely been reported. Herein, we demonstrate a rational synthetic strategy to modulate the structure and luminescence properties of 0D Mn(II) halide hybrids utilizing the structure-directing d10metal ions (Cd2+/Zn2+). 0D metal halide hybrids of Cd2+/Zn2+, which act as hosts with tunable structures, accept Mn2+ions as substitutional dopants. This structural flexibility of the host d10metal ions is realized by optimizing the metal-to-ligand ratio (Cd/AEPip). This reaction parameter allows structural transformation from an octahedral (AEPipCdMnBrOh) to a tetrahedral (AEPipCdMnBrTd) 0D Mn halide hybrid with tunable luminescence (orange → green) with high photoluminescence quantum yield. Interestingly, when Zn2+is utilized, a tetrahedral AEPipZnMnBr structure forms exclusively with strong green emission. Optical and single-crystal X-ray diffraction structural analysis of the host and the doped system supports our experimental data and confirms the structure-directing role played by Cd2+/Zn2+centers. This work demonstrates a rational strategy to modulate the structure/luminescence properties of 0D Mn(II) halide hybrids, which can further be implemented for other 0D metal halide hybrids. © 2022 American Chemical Society. All rights reserved.

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IITH Creators:

IITH Creators	ORCiD
Raavi, Sai Santosh Kumar	http://orcid.org/0000-0002-2496-9233

Item Type:

Article

Additional Information:

The authors acknowledge Dr. R. G. Gonnade (NCL Pune), Dr. Anupam Biswas (NCL Pune), and Dr. G. R. Naik (Central University of Karnataka) for insightful discussion and support. D.K.D. acknowledges PMRF for funding. R.P. acknowledges financial support from the DST-SERB Grant No. SB/EMEQ-287/2014. This work was financially supported by DST Grant No. CRG/2019/000252.

Uncontrolled Keywords:

Higher exciton binding energy; Lighting applications; Luminescence properties; Metals ions; Photoluminescence properties; Structural transformation; Structure property; Tunabilities; Zero-dimensional; Zn 2+

Subjects:

Physics
Chemistry

Divisions:

Department of Chemistry
Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

13 Jul 2022 10:41

Last Modified:

13 Jul 2022 10:41

URI:

http://raiithold.iith.ac.in/id/eprint/9471