Facile controlled preparation of phosphonic acid-functionalized gold nanoparticles.
In the preparation and storage of gold nanoparticles (Au-NPs) in colloidal form, the stability of the colloid is of utmost importance. We report a novel strategy for the synthesis of the phosphonic acid-functionalized gold nanoparticles (Au-NPs) with the high colloid stability by using ethylenediamine-tetramethylene phosphonic acid (EDTMP) as the reducing agent and its oxidation product as the stabilizing agent. The resultant phosphonic acid-functionalized Au-NPs show a remarkable colloidal stability, which likely arises from strong electrostatic effect of negatively charged phosphonate groups and the extremely hydrophilic property of phosphonate groups. Through the present method, the scope of reducing and stabilizing agents for preparation of phosphonic acid-functionalized Au-NPs extend from the -PO(3)H(2)-terminated thiols to the aminopolyphosphonates.
Zhang
Fan
F
The Laboratory of Electrochemistry, College of Chemistry and Material Science, Nanjing Normal University, 1# Wenyuan Road, Nanjing 210046, PR China.
Zhou
Yue
Y
Chen
Yu
Y
Shi
Zhongwen
Z
Tang
Yawen
Y
Lu
Tianhong
T
D003102:Colloids / Q000138:chemical synthesis / Q000737:chemistry; D005029:Ethylenediamines / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D063065:Organophosphonates / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
D003102:Colloids; D005029:Ethylenediamines; D009942:Organometallic Compounds; D063065:Organophosphonates; C031234:ethylenediamine; D006046:Gold