Synthesis and characterisation of a bis(silyloxy)tin(IV) porphyrin

Reactivity of bisthiosemicarbazones with Sn(II) and Sn(IV): The synthesis and structure of an eight-coordinate complex with two bis(thiosemicarbazone) ligands

“…The 119 Sn chemical shift observed in complex 1, À604 ppm, is indicative of Sn(IV) in a hexacoordinate environment, confirming the oxidation of the metal centre, and it is in agreement with the chemical shift of other complexes found in the literature [10,11]. This value corresponds well with a N 2 S 2 Cl 2 coordination, where the presence of chloride leads to a more negative value of the chemical shift, due to its inductive effect and also to the possibility of additional p-contribution to the Sn-Cl bond, which would shield the nucleus to a greater extent [11].…”

Reactivity of Thiosemicarbazides with Redox Active Metal Ions: Controlled Formation of Coordination Complexes versus Heterocyclic Compounds

“…[55,56] This value falls within the range of N 2 S 2 Cl 2 coordination in which the presence of two chlorido ligands leads to a more negative value of the chemical shift than the one found with S, N, O or Cdonor ligands, owing to their inductive effect and also to the possibility of additional p-contribution to the Sn À Cl bond, which would shield the nucleus to a greater extent. [56] These factors increase significantly when chlorido is changed for iodido and the 119 Sn NMR of complex 8 is À1844 ppm, which correlates well with Sn IV in a N 2 S 2 I 2 environment.…”

Enhanced stokes shift of S2→S0 emission and structural investigations of Sn(IV)Porphyrins doped hybrid borate glasses

“…Langford et al have introduced bis(silyloxy)tin(IV) porphyrins into silica beads for producing novel photochromic glasses the prospective applications as organic solar cells [9]. Delmarre et al have reported the environment effect of on the photophysical behaviour of Sn(IV)Porphyrinon zirconium-silica hybrid network [10].…”