香港理工大学Wai Yeung (Raymond) Wong制备了一类新型的光功能2D有机金属纳米片，金属化石墨炔。 相关研究成果于2021年2月24日发表在国际知名学术期刊《德国应用化学》。

二维纳米材料因其优异的电学和光学性能而备受关注。

该文中，研究人员首次通过界面辅助自下而上方法制备两种独立的汞化石墨纳米片，该方法综合了金属中心和石墨的优点。化学生长得到的连续大面积纳米片具有层状的分子结构排列、可控的厚度和增强的π共轭，使其在532nm和1064nm处具有稳定而优异的宽带非线性饱和吸收（SA）特性。该两种纳米片作为饱和吸收剂的被动Q转换（PQS）性能与最先进的2D纳米材料（如石墨烯、黑磷、MoS2、γ-石墨烯等）相当或更高。

研究结果表明，该两种金属化石墨炔不仅可以作为一类新型的二维富碳材料，而且可以作为廉价易得的光电器件材料。

附：英文原文

Title: Metallated graphynes as a new class of photofunctional 2D organometallic nanosheets

Author: Linli Xu, Jibin Sun, Tianhong Tang, Hongyang Zhang, Mingzi Sun, Jianqi Zhang, Jiahua Li, Bolong Huang, Zhengping Wang, Zheng Xie, Wai Yeung (Raymond) Wong

Issue&Volume: 2021-02-24

Abstract: Two‐dimensional (2D) nanomaterials are attracting much attention due to their excellent electronic and optical properties. Here, we report the first experimental preparation of two free‐standing mercurated graphyne nanosheets via the interface‐assisted bottom‐up method, which integrates both the advantages of metal center and graphyne. The continuous large‐area nanosheets derived from the chemical growth show the layered molecular structural arrangement, controllable thickness and enhanced π‐conjugation, which result in their stable and outstanding broadband nonlinear saturable absorption (SA) properties (at both 532 and 1064 nm). The passively Q‐switched (PQS) performances of these two nanosheets as the saturable absorbers are comparable to or higher than those of the state‐of‐the‐art 2D nanomaterials (such as graphene, black phosphorus, MoS2, γ‐graphyne, etc.). Our results illustrate that the two metallated graphynes could act not only as a new class of 2D carbon‐rich materials, but also as inexpensive and easily available optoelectronic materials for device fabrication.

DOI: 10.1002/anie.202014835

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202014835