TY - JOUR
T1 - Influence of configuration of carboxylic acid capping ligands on the salt-induced aggregation of gold clusters
AU - Li, Di
AU - Huang, Yunjie
AU - Li, Jinghong
PY - 2005/3/15
Y1 - 2005/3/15
N2 - Oxalic acid (Ox) and 1,2,3,4-cyclobutanetetracarboxylic acid (CBTCA) were employed as capping ligands in the preparation of gold colloids. FTIR indicated that Ox adopted a linear configuration through one oxygen atom and one gold atom, while CBTCA adopted a bridge configuration through two oxygen atoms and two gold atoms. Ox-gold colloids exhibited aggregation upon addition of NaClO4, while they remained as isolated particles upon NaCl. For CBTCA-gold colloids, not NaClO4 but NaCl resulted in aggregation. The reversed results were considered to have been influenced by the different configurations of Ox and CBTCA, which were combined results of the Lewis basicity and steric hindrance of the added ions.
AB - Oxalic acid (Ox) and 1,2,3,4-cyclobutanetetracarboxylic acid (CBTCA) were employed as capping ligands in the preparation of gold colloids. FTIR indicated that Ox adopted a linear configuration through one oxygen atom and one gold atom, while CBTCA adopted a bridge configuration through two oxygen atoms and two gold atoms. Ox-gold colloids exhibited aggregation upon addition of NaClO4, while they remained as isolated particles upon NaCl. For CBTCA-gold colloids, not NaClO4 but NaCl resulted in aggregation. The reversed results were considered to have been influenced by the different configurations of Ox and CBTCA, which were combined results of the Lewis basicity and steric hindrance of the added ions.
KW - Carboxylic acid
KW - Configuration
KW - Gold colloid
KW - Salt-induced aggregation
UR - https://www.scopus.com/pages/publications/13844271338
U2 - 10.1016/j.jcis.2004.09.024
DO - 10.1016/j.jcis.2004.09.024
M3 - 文章
AN - SCOPUS:13844271338
SN - 0021-9797
VL - 283
SP - 440
EP - 445
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
IS - 2
ER -