Title of article :
Penentuan Aras Jalur Tenaga Kompleks Tungsten Nitrosilditiolena(Determination of Band Energy Levels for Tungsten Nitrosyldithiolene)
Author/Authors :
Mark Lee, Wun Fui Universiti Kebangsaan Malaysia - Fakulti Sains dan Teknologi - Pusat Pengajian Sains Kimia dan Teknologi Makanan1Pusat Pengajian Sains Kimia dan Teknologi Makanan, Malaysia , Ng, Kim Hang Universiti Kebangsaan Malaysia - Fakulti Sains dan Teknologi - Pusat Pengajian Sains Kimia dan Teknologi Makanan, Malaysia , Minggu, Lorna Jeffery Universiti Kebangsaan Malaysia - Institut Sel Fuel, Malaysia , Umar, Akrajas Ali Universiti Kebangsaan Malaysia - Institut Kejuruteraan Mikro dan Nanoelektronik (IMEN), Malaysia , Kassim, Mohammad B. Universiti Kebangsaan Malaysia - Fakulti Sains dan Teknologi - Pusat Pengajian Sains Kimia dan Teknologi Makanan, Malaysia
Abstract :
The chemical and physical properties of tungsten nitrosyldithiolene complexes with a general formulae of [WTp*(NO)(L)] where Tp* = tris(3,5-dimethylpyrazolyl)hidroborate and L = toluene 3,4-dithiolate (L1), 1,2-benzenedithiolate (L2), 3,6-dichloro-1,2-benzenedithiolate (L3), have been studied for application as a photosensitizer in an anode for photoelectrochemical cell. These complexes were synthesized and characterised by infrared (IR), ultraviolet-visible (UV-Vis) spectroscopy and CHNS micro elemental analysis. Cyclic voltammetry (CV) was used to determine their redox potentials and their band energies were calculated from the potentials obtained. All three complexes showed energy band gaps in the range of 1.59 – 1.63 eV. The calculated band gaps from CV analyses were comparable with the estimated values obtained from the UV-Vis absorption data. Based on the postulated band diagram, these complexes may be a potential photosensitizer to be used in the photoeletrodes for photoelectrochemical cells
Keywords :
Photoelectrochemical cell , photosensitizer , tungsten nitrosyldithiolene
