Fluorinated graphdiyne as a significantly enhanced fluorescence material

Abstract

The enhanced fluorescence of FGDY is considered to be induced by low phonon energy of fluoride, reducing non-radiative transition sites.

Graphdiyne Nanosheets for Multicolor Random Lasers

“…Different from gapless graphene, single-layer GDY is ascribed to be a narrow-band-gap semiconductor, with a band gap of around 0.44–1.47 depending on the calculation methods . Furthermore, the energy structures can be largely tuned by the number of layers, stacking symmetry, strains, and chemical decorations, , endowing GDY with colorful optical features. , Giving great potential as a novel random laser gain medium, the photoemission properties of GDY have just entered the field of view of researchers. ,, Herein, a large-sized GDY was synthesized and subsequently used to prepare homogeneous nanosheets dispersed in a chlorobenzene solvent. The photoemission properties and photocarrier dynamics in this solution were systematically investigated.…”

Graphdiyne: from Preparation to Biomedical Applications

“…The chemical modification of GDY using light elements is a possible route to regulate its unique structure and optoelectronic properties. The fluorescence enhancement is considered to be caused by defect states, which shows the potential properties of GDY as light-emitting devices, such as biosensors [137] .…”

Toward the synthesis, fluorination and application of N–graphyne

“…For the latter, usually, two distinct chemical shis can be distinguished, rst at 82-86 ppm characteristic for C sp 3 -F groups and the second one at 132 ppm assignable to the interactions between sp 2 carbon and uorine atom from the neighbouring CF groups. 32 The formation of carbon-uorine bonds aer uorination conducted with various concentration of XeF 2 was conrmed by solid state 19 F NMR and the normalised spectra are shown in Fig. 4d.…”

“…with graphdiyne-like structure made from triuorobenzene precursor 18 and graphdiyne-like structures uorinated using XeF 2 focused on their photoluminescence properties. 19 In the present work, a new type of N-graphyne material built on 1,3,5-triethynylbenzene and triazine units was synthesised and subjected to uorination reaction carried out with XeF 2 . Xenon diuoride was chosen as uorination agent due to its high reactivity and selectivity towards organic compounds bearing double or triple bonds.…”

“…Fig.413 C solid state NMR of pristine TCC (A), TCCF1 (B) and TCCF2 (C);19 F solid state NMR of fluorinated N-graphynes, wherein 1 is CF 2 , 2 is CF]CH, 3 is CF]CF and asterisks are rotational sidebands of 3 (D); the map of CF bonds made up during fluorination (E).…”