Electrochemical, photovoltaic and DFT studies on hybrid materials based on supramolecular self-assembly of a ditopic twisted perylene diimide with square-planar platinum(II)- and/or palladium(II)-2,2?:6?,2?-terpyridyl complex ions

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dc.contributor.authorIşık Büyükekşi S.
dc.contributor.authorOrman E.B.
dc.contributor.authorAcar N.
dc.contributor.authorAltındal A.
dc.contributor.authorÖzkaya A.R.
dc.contributor.authorŞengül A.
dc.date.accessioned2021-05-03T20:48:26Z
dc.date.available2021-05-03T20:48:26Z
dc.date.issued2019
dc.description.abstractA ditopic bridging ligand, N,N?-bis(pyridine)-1,6,7,12-tetrakis-(4-methoxyphenoxy)perylene diimide (1) was synthesized. Metallosupramolecular self-assembly of 1 with 2,2?:6?,2?-terpyridyl-platinum(II) and/or -palladium(II) complex ions afforded to new triads [(terpy)M(II)-(1)-M(II)(terpy)](NO3)4 where, M(II) = Pt(II) (2), and Pd(II) (3), respectively. These isolated triads 2 and 3 and also free ligand 1 were fully characterized by FT-IR, 1H NMR, 13C DEPT NMR, 1H-1H COSY NMR, MALDI TOF and HRMS (MALDI-TOF/TOF-MS) mass techniques and UV/Vis spectroscopy. DFT studies revealed that the molecular structure of 1 is highly distorted and deviated from the planarity by bulky methoxyphenyl groups at bay positions. The calculated HOMO and LUMO are located on the PDI core and phenyl groups, and the band gap was found to be 2.27, 2.23 and 2.24 eV in DMSO for 1, 2 and 3, respectively. The calculated UV/Vis spectra are in good agreement with those of experimental results. Electrochemical, in situ spectroelectrochemical and in situ electrocolorimetric measurements in solution suggested that redox processes of the compounds are accompanied by favourable electron transport properties with remarkably narrow HOMO-LUMO gaps and intense light absorption over the visible range. The association of usually reversible and fast electron transfer processes with the net colour changes in solution pointed out the applicability of the compounds as an electrochromic material. The electrochromic performance measurements with the films of the compounds on indium tin oxide glass provided additional support for their usability as a colour changing material in electrochromic devices. Surface morphologies of the films were characterized by scanning electron microscopy (SEM). The metal complexes of 1, especially the platinum(II) complex (2), behaved as a good neutral and cathodic colouring electrochromic material with fast response time, long-term stability, and long-term write erase efficiency. The photovoltaic performance of the compounds as electron acceptor material was investigated by varying their relative ratio in the bulk heterojunction solar cells. It was found that the photovoltaic conversion efficiency of the devices strongly depends on the blend ratio. The optimized performance for the devices was obtained with the P3HT:PDIs (weight ratio 1.0:1.5) blended films. For this blend ratio, the device showed a maximum conversion efficiency of 3.91%, 8.17% and 5.18% for 1, 2 and 3, respectively. The results obtained reveal that employing 2 as an acceptor material has great potential for the development of highly efficient nonfullerene bulk heterojunction photovoltaic devices. © 2018en_US
dc.description.sponsorshipConsejo Nacional de Investigaciones Científicas y Técnicas, CONICET: 214Z090 Türkiye Bilimler Akademisi, TÜBAen_US
dc.description.sponsorshipThe authors are grateful to the Turkish Scientific and Technical Research Council for support of this project under the grant [TÜBİTAK-Project No: 214Z090]. We also thank for computer time on FenCluster provided by Ege University Faculty of Science and TUBITAK-ULAKBIM Truba Resources. Ali Rıza Özkaya also thanks Turkish Academy of Sciences for partial support to this work. The authors gratefully thank Prof. Dr Bekir SALIH at the Hacettepe University for the MALDI-TOF and HRMS analysis.en_US
dc.description.sponsorshipThe authors are grateful to the Turkish Scientific and Technical Research Council for support of this project under the grant [TÜBİTAK-Project No: 214Z090 ]. We also thank for computer time on FenCluster provided by Ege University Faculty of Science and TUBITAK-ULAKBIM Truba Resources. Ali Rıza Özkaya also thanks Turkish Academy of Sciences for partial support to this work. The authors gratefully thank Prof. Dr Bekir SALIH at the Hacettepe University for the MALDI-TOF and HRMS analysis.en_US
dc.identifier.doi10.1016/j.dyepig.2018.09.022
dc.identifier.endpage78en_US
dc.identifier.issn0143-7208
dc.identifier.issn0143-7208en_US
dc.identifier.scopus2-s2.0-85053752370en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage66en_US
dc.identifier.urihttps://doi.org/10.1016/j.dyepig.2018.09.022
dc.identifier.urihttps://hdl.handle.net/11454/70869
dc.identifier.volume161en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Ltden_US
dc.relation.ispartofDyes and Pigmentsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDensity functional theoryen_US
dc.subjectPerylene diimide (PDI)en_US
dc.subjectPhotovoltaicsen_US
dc.subjectPyridineen_US
dc.subjectSquare-planar complexesen_US
dc.subjectTerpyridineen_US
dc.titleElectrochemical, photovoltaic and DFT studies on hybrid materials based on supramolecular self-assembly of a ditopic twisted perylene diimide with square-planar platinum(II)- and/or palladium(II)-2,2?:6?,2?-terpyridyl complex ionsen_US
dc.typeArticleen_US

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