Gold nanocluster and high-yield preparation method thereof
A gold nanocluster, high-yield technology, applied in nanotechnology, nanotechnology, organic chemical methods, etc., can solve the problem of low yield of gold nanoclusters, achieve the effect of simple operation and improved preparation efficiency
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[0033] see figure 1 , the embodiment of the present invention provides a high-yield preparation method of gold nanoclusters, comprising the following steps:
[0034] S100, providing (1) a phosphorus ligand with a carboxyl group and an acid; or (2) a phosphorus ligand with a carboxyl group bound to an acid molecule;
[0035] S200, mixing (1) or (2), an organic complex of gold, and an alcohol compound in a solvent for pre-reaction; and
[0036]S300, adding a reducing agent to react to obtain gold nanoclusters. In one embodiment, the molecular formula of the gold nanocluster is [Au 13 L 8 Y 4 ] X. Wherein, L is a phosphorus ligand having an ester group, Y is F, Cl, Br or I, and X is an anionic group.
[0037] The high-yield preparation method of gold nanoclusters in the embodiment of the present invention, the phosphorus ligand containing carboxyl, under the joint action of carboxyl and acid, induces Au 13 High yields were generated to obtain thirteen-nuclear gold nanoclus...
Embodiment 1
[0052] 0.1 mmol phosphorus ligand Ph 2 PCH 2 CH 2 Organic complex Me of COOH and 0.1 mmol gold 2 SAuCl was mixed and dissolved in 10mL of dichloromethane and methanol mixed solution and stirred, then adding 0.1mmol of H + hydrochloric acid solution and 4mg NaBH dissolved in 1mL ethanol 4 , you can get about 7.5×10 -3 The molecular formula in mmol is [Au13 (Ph 2 PCH 2 CH 2 CO 2 CH 3 ) 8 Cl 4 ] Cl of Au 13 nanoclusters. see figure 2 , is the mass spectrum of the nanocluster, and the main peak of the mass spectrum can be observed. see image 3 , is the ultraviolet absorption spectrum diagram of the nanocluster, and an obvious absorption peak can be observed at a wavelength of about 350nm.
Embodiment 2
[0054] 0.1 mmol phosphorus ligand P(CH 2 CH 2 COOH) 3 Organic complex Me of HCl and 0.1 mmol gold 2 SAuCl was mixed and dissolved in a mixed solution of 10mL dichloromethane and methanol and stirred, then 4mg NaBH dissolved in 1mL ethanol was added 4 , you can get about 7.5×10 -3 mmol molecular formula is {Au 13 [P(CH 2 CH 2 CO 2 CH 3 ) 3 ] 8 Cl 4}Cl of Au 13 nanoclusters. see Figure 4 , is the mass spectrum of the nanocluster, and the main peak of the mass spectrum can be observed. see Figure 5 , is the ultraviolet absorption spectrum of the nanocluster, and an obvious absorption peak can be observed at a wavelength of about 325nm.
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