Basel Siddhant, Bhardwaj Karishma, Pradhan Sajan, Pariyar Anand, Tamang Sudarsan
Department of Chemistry, School of Physical Sciences, Sikkim University, Tadong, Gangtok 737102, Sikkim, India.
ACS Omega. 2020 Mar 18;5(12):6666-6675. doi: 10.1021/acsomega.9b04448. eCollection 2020 Mar 31.
The metal salts of fatty acid (M-FA) are the most widely used metal precursors to colloidal semiconductor nanocrystals (NCs). They play a key role in controlling the composition, shape, and size of semiconductor NCs, and their purity is essential for attaining impeccable batch-to-batch reproducibility in the optical and electrical properties of the NCs. Herein, we report a novel, one-pot synthesis of a library of highly pure M-FAs at near-quantitative yields (up to 91%) using 1,8-diazabicyclo[5.4.0]undec-7-ene or the related nonionic/noncoordinating base as an inexpensive and ecofriendly catalyst in a green solvent medium. The method is highly general and scalable with vast academic and industrial potential. As a practical application, we also demonstrate the use of these high-quality M-FAs in the synthesis of the spectrum of colloidal semiconductor NCs (III-V, II-VI, IV-VI, I-VI, I-III-VI, and perovskite) having absorption/emission in visible to the near-infrared region.
脂肪酸金属盐（M-FA）是用于制备胶体半导体纳米晶体（NC）的最广泛使用的金属前驱体。它们在控制半导体NC的组成、形状和尺寸方面起着关键作用，并且其纯度对于在NC的光学和电学性质方面实现无可挑剔的批次间重现性至关重要。在此，我们报道了一种新颖的一锅法合成高纯度M-FA库的方法，使用1,8-二氮杂双环[5.4.0]十一碳-7-烯或相关的非离子/非配位碱作为廉价且环保的催化剂，在绿色溶剂介质中以接近定量的产率（高达91%）进行合成。该方法具有高度通用性且可扩展，具有巨大的学术和工业潜力。作为实际应用，我们还展示了这些高质量的M-FA在合成具有从可见光到近红外区域吸收/发射的胶体半导体NC光谱（III-V、II-VI、IV-VI、I-VI、I-III-VI和钙钛矿）中的应用。
