Derivatization of nanodiamonds with osmium carbonyl clusters

Abstract

The derivatization of nanodiamonds (NDs) with osmium and ruthenium clusters has been carried out via the reaction of various clusters with unmodified and acid- functionalized NDs. These have been characterized by IR and mass spectrometry, as well as elemental analyses. An attempt to model the reactions with the ND surface was made using 1-adamantanecarboxylic acid. It was found that the reaction of Ru3(CO)12 (5) with 1-adamantanecarboxylic acid (AdCOOH) afforded a purple polymer [Ru2(CO)4(OOCAd)2]n (6) which dissolved reversibly in coordinating solvents (L) to form dinuclear adducts Ru2(CO)4(OOCR)2L2. The reaction of 6 with PPh3 in a 1:0.5 Ru:P ratio afforded a novel, electron deficient, tetraruthenium chain complex Ru4(CO)8(OOCAd)4(PPh3)2 (9).