Spectroscopic, electrochemical and photovoltaic properties of Pt(ii) and Pd(ii) complexes of a chelating 1, 10-phenanthroline appended perylene diimide. Issue 8 (31st January 2018)

• Record Type: Journal Article
• Authors: Işık Büyükekşi, Sebile; Şengül, Abdurrahman; Erdönmez, Seda; Altındal, Ahmet; Orman, Efe Baturhan; Özkaya, Ali Rıza
• Is Part Of: Dalton transactions. Volume 47:Issue 8(2018)
• Page Start: 2549
• Page End: 2560
• Publication Date: 2018-01-31
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7dt04713d
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The triads exhibit pronounced semiconducting properties and have the potential for use in DSSCs as a sensitizer. Abstract : In this study, a bis-chelating bridging perylene diimide ditopic ligand, namely N, N ′-di(1, 10-phenanthroline)-1, 6, 7, 12-tetrakis-(4-methoxyphenoxy)perylene tetracarboxylic acid diimide (1 ), was synthesized and characterized. Further reactions of1 with d 8 metal ions such as Pt(ii ) and Pd(ii ) having preferential square-planar geometry afforded the novel triads [(Cl2 )M(ii )-(1 )-M(ii )(Cl2 )] where M(ii ) = Pt(ii ) (2 ), and Pd(ii ) (3 ), respectively. The isolated triads and the key precursor were fully characterized by FT-IR, 1D-NMR ( 1 H NMR and 13 C DEPT NMR), 2D-NMR ( 1 H– 1 H COSY, 1 H– 13 C HSQC, 1 H– 13 C HMBC), MALDI-TOF mass and UV/Vis spectroscopy. The electrochemical properties of1, 2 and3 were investigated by cyclic voltammetry as well as in situ spectroelectrochemistry and also in situ electrocolorimetric measurements. These compounds were shown to exhibit net colour changes suitable for electrochromic applications. The compounds exhibited remarkably narrow HOMO–LUMO gaps, leading to their ease of reduction at low negative potentials. More importantly, dye-sensitized solar cells (DSSCs) were also fabricated using1–3 to clarify the potential use of these complexes as a sensitizer. Analysis of the experimental data indicated that2 has good potential as a sensitizer material for DSSCs.