| In this paper,we use high pressure technology which plays an important role in regulation on properties and structure in materials to complete the following work:(1)We synthesized a new amorphous allotrope of phosphorus under high pressure and high temperature condition,which we call it high pressure high temperature amorphous red phosphorus(HPHT a-rP),by using a cubic anvil cell apparatus and commercial amorphous red phosphorus(a-rP)as starting materials.X-ray powder diffraction,density measurement and fluorescence spectroscopy are conducted to analyses the structure transition from a-rP to HPHT a-rP and a new phase diagram is provided.Further thermal gravimetric analyzer and visible-light photocatalytic experiments are carried out and show HPHT a-rP have an outstanding thermostability and photocatalysis.This work enriches the phase diagram of red phosphorus,complements the structure study of red phosphorus,and expands the application of red phosphorus in photocatalysis and other various industrial fields.(2)The aggregation induced emission(AIE)effect is induced by diamond anvil cell(DAC)in a series of 2,6-bis((E)-2-(pyridin-4-yl)vinyl)phenol-conjugated backbone decorated with hydrogen functional groups acting as H-bond donors and acceptors.In situ photoluminescence emission spectra,UV-vis absorption spectra and IR spectra were measured under high pressure to study the photoluminescence behaviors of these organic fluorophores.We propose that new H-bond was constructed under pressure and maintained after the pressure was released.The H-bond restrict the intramolecular nonradiative motions and enhance the photoluminescence emission,which is known as the aggregation induced emission(AIE)effect.This work provides an example for the design and synthesis of novel AIE photoelectric materials,and lays a foundation for the subsequent high pressure chemistry research of organic fluorescent molecules. |
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