Module Replacement of Gold Nanoparticles by a Pseudo-AGR Process

Partial Phosphorization: A Strategy to Improve Some Performance(s) of Thiolated Metal Nanoclusters Without Notable Reduction of Stability

“…The further addition of PPh 3 in Au 23 solution results in the formation of Au 11 (PPh 3 ) 8 Cl 2 , indicating that novel structure cannot be induced by the solely dose control any more under this situation. Basing on the previous synthesis of Au 24 (SC 2 H 4 Ph) 20 , [11] Au 37 (SC 6 H 11 ) 23 [12] and Au 44 (SC 2 H 4 Ph) 25 , [13] we concluded that the additive plays an important role in the transformation of nanoclusters. Therefore, we tried different acid, [14] base, [15] oxidant, [16] metal salt, [17] etc.…”

“…For the phosphorization pathway summary, see Scheme 2. Note that, the transformation from Au 23 or Au 22 -2P to Au 22-x Cu x -4P (x = 1, 2) is an anti-galvanic reaction (AGR: the reaction between metal ions (free or unfree) and less reactive (or more noble) metal nanoparticles), [18] and the transformation from Au 22-x Cu x -4P (x = 1, 2) to Au 22 -4P is a pseudo-anti-galvanic reaction (pseudo-AGR: the reaction between metal ions (free or Chemistry-A European Journal unfree) with the same metal nanoparticles), [11,12,19] thus the transformation from Au 23 or Au 22 -2P to Au 22 -4P can be actually regarded as a combination of anti-galvanic reaction and pseudo-anti-galvanic reaction. Such reactions are not the common metal ion exchange reactions [20] since the reverse reactions (i. e. from Au 22 -4P to Au 22-x Cu x -4P (x = 1, 2) or from Au 22-x Cu x -4P (x = 1, 2) to Au 22 -2P) were not observed in the reaction between Au 22 -4P and variously dosed Cu(PPh 3 ) 2 NO 3 or between Au 22-x Cu x -4P (x = 1, 2) and AuPPh 3 Cl.…”

Controlling ultrasmall gold nanoparticles with atomic precision

“…Wu et al also revealed a module replacement (MR)-like process during the pseudo-AGR of Au 48 (CHT) 26 . 101 The MR-like process involves the replacement of the local structural unit (including three or more Au atoms) by a new one. As-obtained Au 37 (CHT) 23 and Au 48 (CHT) 26 share the same Au 31 (CHT) 12 section as the other section (Au 6 (CHT) 11 vs.…”

Single, Self-Born RP-Au-PR Motif Boosts 19-Fold Photoluminescence Quantum Yield of Metal Nanocluster

“…This work provides new views to the structure and photoluminescence of gold-silver nanocluster, has important implications for the structure-property understanding and the property improvement. Keywords metal nanocluster; RP-Au-PR motif; photoluminescence 1 引言 金属纳米团簇由于具有精确的原子组成与结构、超 小的纳米尺寸(3 nm 以下)和丰富的物理化学性质 [1][2][3][4][5][6][7][8] , 在催化 [9][10][11][12][13] 、生物医学 [14][15][16][17][18] 和传感 [19][20][21][22][23] 等领域具有极大 的应用潜力, 引起了科学家们的广泛关注. 稳定性是团 簇科学研究和实际应用中需要考察的一个重要因素, 这 也是科学家们近来将注意力从膦保护的金属纳米团簇 转移到硫醇保护的金属纳米团簇的原因.…”