Using coordination chemistry to develop new routes to semiconductor and other materials

Synthesis of two new group 13 benzoato–chloro complexes: A structural study of gallium and indium chelating carboxylates

“…1 2 The N1-Ga-N2 angle is 171.04(12)°; as expected the picoline rings tilt towards the chelated benzoate. The three aromatic rings are roughly parallel; giving the complex a semi-paddlewheel appearance, more typically associated with bridging carboxylate structures (Refs.…”

“…The reaction most likely proceeds through an intermediate ethane-like formally Ga(II) complex, Ga 2 Cl 4 (γ-pic) 2 (3). An unsuccessful attempt to produce a gallium basic carboxylate (Ref.…”

“…We had previously exploited this chemistry when we prepared the first example of an eight-coordinate indium benzoate, In(O 2 CC 6 H 5 ) 3 (4-Mepy) 2 , by oxidation of indium metal powder with a 3:2 excess of benzoyl peroxide in γ-picoline (Ref. 10).…”

Facile Synthesis of Bis(dichalcogenophosphinate)s and a Remarkable [Li8(OH)6]2+ Polyhedron

“…Despite this potential drawback, diselenophosph(in)ates have been studied in some depth both for their diverse coordination chemistry, in particularly with soft metal centers such as copper(I), 8 and for their potential applications such as precursors to metal selenide semi-conducting materials. [9][10][11][12][13] In contrast, the heavier ditellurophosp(in)ate homologs are virtually unreported -the only structurally characterized example being the solvent separate ion pair complex [Ph 2 PTe 2 ][Li(THF) 3.5 (TMEDA) 0.25 ] (TMEDA = tetramethyl-ethylenediamine). 14 We have recently reported upon a clean and high-yielding route to dichalcogenophosphinates based upon the treatment of metallated secondary phosphines with two equivalents of elemental chalcogen (Scheme 1).…”

Single-molecule precursor-based approaches to cobalt sulphide nanostructures

“…Nanoparticles of cobalt sulphide have been synthesized by hydrothermal (Liu 2005) or solvothermal methods (Qian et al 2000), microwave-assisted techniques (Chen et al 2003) and the thermolysis of single-source precursors (Dutta et al 2008;Maneerprakorn et al 2010). In our continuing search for routes to semiconductor nanoparticles from single-source precursors (Trindade et al 2001;Li et al 2006;Fan et al 2007;Afzaal et al 2010), we now report the synthesis of cobalt complexes of 1,1,5,5-tetramethyl-2,4-dithiobiuret, [Co{N(SCNMe 2 ) 2 } 3 ] (1), and 1,1,5,5-tetraisopropyl-2-thiobiuret, [Co{N(SOCN i Pr 2 ) 2 } 2 ] (2), and their use for the selective synthesis of Co 1−x S and Co 4 S 3 phase cobalt sulphide nanoparticles.…”