Effects of some neutral ligands on the co-ordination of the thiocyanate ion in some anionic platinum(II) complexes

Anderson, Stephen J.; Goodfellow, R. J.

doi:10.1039/dt9770001683

Cited by 12 publications

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“…The various steric and electronic influences of a PtL 3 fragment for tipping the scale towards either κN or κS coordination of a thiocyanate ligand are textbook examples for the phenomenon of coordination isomerism. 41,42 N coordination in spite of the soft character of the {Pt(BODIPY)(PEt 3 ) 2 } fragment is here favoured by the strong trans-influence of the opposite carbyl ligand, the light donor atom, and by steric effects. Thus, N coordination maintains a near coincidence of the NCS − axis with the C1-Pt-N vector Pt-N3-C22 = 162.2(4)°, S1-C22-N3 = 179.7(4)°, thus avoiding unfavourable steric interactions with the cis-disposed PEt 3 ligands (Fig.…”

Section: Single Crystal X-ray Diffractionmentioning

confidence: 84%

Complexes trans-Pt(BODIPY)X(PEt₃)₂: excitation energy-dependent fluorescence and phosphorescence emissions, oxygen sensing and photocatalysis

Irmler

Winter

2016

Dalton Trans.

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We report on five new complexes with the general formula trans-Pt(BODIPY)X(PEt3)2 (), where the platinum(ii) ion is σ-bonded to a 4,4-difluoro-4-bora-3a,4a-diaza-s-indacen-8-yl (BODIPY) and an anionic ligand X(-) (X(-) = Cl(-), I(-), NO2(-), NCS(-), CH3(-)). All five complexes were characterized by multinuclear NMR, electronic absorption and luminescence spectroscopy and by X-ray diffraction analysis. Four of these complexes show efficient intersystem crossing (ISC) from an excited singlet state to a BODIPY-centred T1 state and exhibit dual fluorescence and phosphorescence emission from the BODIPY ligand. In , the fluorescence is almost completely quenched, whereas the phosphorescence quantum yield reaches a value of 40%. The rate of ISC and the ratio of phosphorescence to fluorescence emissions depend on the excitation wavelength (i.e. on which specific transition is excited). The performance of these complexes as one-component oxygen sensors and their photocatalytic activities were tested by Stern-Volmer quenching experiments and by monitoring the oxidation of 1,5-dihydroxynaphthalene with (1)O2 generated from the long-lived triplet state of the sensitizer by triplet-triplet annihilation with (3)O2. Exceptionally high (1)O2 generation quantum yields of up to near unity were obtained.

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Section: Single Crystal X-ray Diffractionmentioning

confidence: 84%

Complexes trans-Pt(BODIPY)X(PEt₃)₂: excitation energy-dependent fluorescence and phosphorescence emissions, oxygen sensing and photocatalysis

Irmler

Winter

2016

Dalton Trans.

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Ligand properties of organic selenium and tellurium compounds

Gysling

1986

PATAI'S Chemistry of Functional Groups

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ChemInform Abstract: EFFECTS OF SOME NEUTRAL LIGANDS ON THE COORDINATION OF THE THIOCYANATE ION IN SOME ANIONIC PLATINUM(II) COMPLEXES

Anderson¹,

Goodfellow²

1977

Chemischer Informationsdienst

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Effects of some neutral ligands on the co-ordination of the thiocyanate ion in some anionic platinum(II) complexes

Cited by 12 publications

References 0 publications

Complexes trans-Pt(BODIPY)X(PEt₃)₂: excitation energy-dependent fluorescence and phosphorescence emissions, oxygen sensing and photocatalysis

Complexes trans-Pt(BODIPY)X(PEt₃)₂: excitation energy-dependent fluorescence and phosphorescence emissions, oxygen sensing and photocatalysis

Ligand properties of organic selenium and tellurium compounds

ChemInform Abstract: EFFECTS OF SOME NEUTRAL LIGANDS ON THE COORDINATION OF THE THIOCYANATE ION IN SOME ANIONIC PLATINUM(II) COMPLEXES

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Effects of some neutral ligands on the co-ordination of the thiocyanate ion in some anionic platinum(II) complexes

Cited by 12 publications

References 0 publications

Complexes trans-Pt(BODIPY)X(PEt3)2: excitation energy-dependent fluorescence and phosphorescence emissions, oxygen sensing and photocatalysis

Complexes trans-Pt(BODIPY)X(PEt3)2: excitation energy-dependent fluorescence and phosphorescence emissions, oxygen sensing and photocatalysis

Ligand properties of organic selenium and tellurium compounds

ChemInform Abstract: EFFECTS OF SOME NEUTRAL LIGANDS ON THE COORDINATION OF THE THIOCYANATE ION IN SOME ANIONIC PLATINUM(II) COMPLEXES

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Product

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Complexes trans-Pt(BODIPY)X(PEt₃)₂: excitation energy-dependent fluorescence and phosphorescence emissions, oxygen sensing and photocatalysis

Complexes trans-Pt(BODIPY)X(PEt₃)₂: excitation energy-dependent fluorescence and phosphorescence emissions, oxygen sensing and photocatalysis