The UVA spectra and the reaction of 5-(p-Leuphenyl)-10,15,20-triphenylporphyrin[H 2(p-Leu)TPP]adsorbed on AgCl colloid in two different solvent-anhydrous alcohol and glacial acetic acid were studied.The experimental r...The UVA spectra and the reaction of 5-(p-Leuphenyl)-10,15,20-triphenylporphyrin[H 2(p-Leu)TPP]adsorbed on AgCl colloid in two different solvent-anhydrous alcohol and glacial acetic acid were studied.The experimental results show that H 2(p Leu)TPP exists in equilibrum between the diacid form H 2(p Leu)TPP 2+ and the free base H 2(p Leu)TPP.At pH=9 5-11 0 the H 2(p-Leu)TPP is converted into Ag(Ⅱ)(p Leu)TPP on AgCl colloids.展开更多
In this paper,we exploited a unique procedure for obtaining thorny gold nanoparticles(Au NPs)with controllable length of thorns without using seeds and surfacta nts.A larger number of Ag+ions was added into the reacti...In this paper,we exploited a unique procedure for obtaining thorny gold nanoparticles(Au NPs)with controllable length of thorns without using seeds and surfacta nts.A larger number of Ag+ions was added into the reaction system containing with HAuCI4 and NH2 OH·HCl,so as to forming colloidal AgCl.AgCl could induce the growth of thorny Au NPs.The morphology of Au NPs changed from short-thorns,longthorns to no-thorns,as the amount of AgNO3 increased.The obtained Au NPs exhibited shapedetermined surface-enhanced Raman spectroscopy(SERS)activity toward rhodamine 6 G(R6 G);indicating their potential for use in SERS-based detections and analysis.展开更多
文摘The UVA spectra and the reaction of 5-(p-Leuphenyl)-10,15,20-triphenylporphyrin[H 2(p-Leu)TPP]adsorbed on AgCl colloid in two different solvent-anhydrous alcohol and glacial acetic acid were studied.The experimental results show that H 2(p Leu)TPP exists in equilibrum between the diacid form H 2(p Leu)TPP 2+ and the free base H 2(p Leu)TPP.At pH=9 5-11 0 the H 2(p-Leu)TPP is converted into Ag(Ⅱ)(p Leu)TPP on AgCl colloids.
基金financially supported by the National Natural Science Foundation of China(No. 21277055)the 111 Project (No. B17019)
文摘In this paper,we exploited a unique procedure for obtaining thorny gold nanoparticles(Au NPs)with controllable length of thorns without using seeds and surfacta nts.A larger number of Ag+ions was added into the reaction system containing with HAuCI4 and NH2 OH·HCl,so as to forming colloidal AgCl.AgCl could induce the growth of thorny Au NPs.The morphology of Au NPs changed from short-thorns,longthorns to no-thorns,as the amount of AgNO3 increased.The obtained Au NPs exhibited shapedetermined surface-enhanced Raman spectroscopy(SERS)activity toward rhodamine 6 G(R6 G);indicating their potential for use in SERS-based detections and analysis.