Graphdiyne:Structure of Fluorescent Quantum Dots

Abstract

Graphdiyne (GDY) as an emerging two‐dimensional carbon allotrope exhibits excellent performance in energy chemistry, catalytic chemistry, optoelectronics, electronics, etc. because of the unique structure combining an sp‐ and sp2‐hybrid carbon network. However, the poor solubility of pristine GDY is a major obstacle to its applications in many fields. Proposed here is a facile strategy to control the preparation of GDY quantum dots (GDY‐Py QDs), in which pyrene groups are covalently linked to GDY by using a Sonogashira cross‐coupling reaction. The as‐prepared GDY‐Py QDs, with an average diameter of about 3±0.1 nm, show superior dispersibility in many organic solvents and water. The GDY‐Py QDs display not only bright fluorescent with a high relative quantum yield (QY) of 42.82 %, but they are also well‐behaved as contrast agents in cell imaging. The GDY‐Py QDs are bestowed with high stability and non‐cytotoxicity, and exhibit long fluorescent times, and have potential for optical imaging and biomedical applications.

Controlled Growth of Donor–Bridge–Acceptor Interface for High‐Performance Ammonia Production

“…), and has shown transformative properties in various fields including catalysis, energy conversion and storage, and other fields. [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] Remarkably, GDY is the only carbon material that can be controllably grown on the surface of arbitrary materials at low temperatures. Besides, the acetylenic bonds (CC) in GDY cannot only effectively chelate metal atoms but also hybridize with heteroatoms (such as N, S, et al), [24,33] which can create more active sites, and enhance the charge transfer ability,…”

Graphdiyne: from Preparation to Biomedical Applications

“…Zhang et al [139] and Guo et al [140] combined GDY with 2D nanomaterials can inhibit/kill microbial cells through a variety of mechanisms, including physical/mechanical puncture [101][102][103] , oxidative stress [103] , cell/membrane component rupture [104,105] and inhibition of bacterial metabolism [106] .…”

Synthesis of Ag2S Based Quantum Dots with Near-infrared-II Fluorescence Emission in Water

“…其中, 以王强 斌团队 [11] 发现和研究的新型 Ag 2 S 基近红外 II 区荧光量 子点体系最具代表性. 尽管 Ag 2 S 基量子点的光致发光 效率很难与 Cd、Pb、Hg 基半导体量子点竞争, 但其稳 定的理化性质和优异的生物相容性使其成为近 10 年来 研究最多的近红外活体荧光探针 [11][12][13][14][15][16][17][18][19][20][21] . 量子点荧光探针的发展在一定程度上受到化学合 成工艺的影响.…”