(C 7 H 11 N 2 ) 2 MBr 4 (M=Cu, Zn): X‐Ray Sensitive 0D Hybrid Metal Halides with Tunable Broadband Emission
(C 7 H 11 N 2 ) 2 MBr 4 (M=Cu, Zn): X‐Ray Sensitive 0D Hybrid Metal Halides with Tunable Broadband Emission
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(C 7 H 11 N 2 ) 2 MBr 4 (M=Cu, Zn)：具有可调谐宽带发射的 X 射线敏感 0D 混合金属卤化物
DOI：
10.1002/ejic.202100954
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发表时间：
2022
影响因子：
2.3
通讯作者：
Saparov, Bayram
中科院分区：
文献类型：
--
作者：
McWhorter, Timothy M.;Zhang, Zheng;Creason, Tielyr D.;Thomas, Leonard;Du, Mao‐Hua;Saparov, Bayram
在此，报道了一个新的杂化金属卤化物家族，(DMAP)2MBr4(M = Cu, Zn)，具有零维 (0D)、伪层状晶体结构，包含分离的分子 4-二甲基氨基吡啶鎓 (DMAP, C7H11N2+) 阳离子和 MBr42−四面体阴离子。 (DMAP)2MBr4 显示出显着的长期稳定性，暴露于环境空气一年后没有降解迹象。报道的溶液合成提供了尺寸达 1 cm 的大晶体，当应用于 X 射线探测器时，该晶体对软 8 keV X 射线光子表现出显着的响应。此外，(DMAP)2ZnBr4 表现出可调谐的颜色发光特性，这归因于基于我们结合的实验和计算结果的有机分子单元。 (DMAP)2ZnBr4 的测量光致发光量子产率 (PLQY) 为 7.35 %，与有机前驱体的微弱发射相比，发射效率显着提高。新型混合金属卤化物的廉价且地球丰富的化学成分以及易于制备使其成为光学和电子应用的有希望的候选者。
Herein, a new family of hybrid metal halides, (DMAP)2MBr4(M = Cu, Zn), featuring zero‐dimensional (0D), pseudo‐layered crystal structures containing isolated molecular 4‐dimethylaminopyridinium (DMAP, C7H11N2+) cations and MBr42−tetrahedral anions are reported. (DMAP)2MBr4show remarkable long‐term stability, with no signs of degradation after one year of ambient air exposure. The reported solution synthesis affords large crystals measuring up to 1 cm, which showed significant response to soft 8 keV X‐ray photons when implemented into X‐ray detectors. Furthermore, (DMAP)2ZnBr4demonstrates tunable color light emission properties, which is attributed to the organic molecular units based on our combined experimental and computational results. The measured photoluminescence quantum yield (PLQY) for (DMAP)2ZnBr4is 7.35 %, a remarkable enhancement of emission efficiency as compared to a weak emission from the organic precursor. The inexpensive and earth‐abundant chemical compositions and ease of preparation of the new hybrid metal halides make them promising candidates for optical and electronic applications.