Solution luminescence from chloro(2,2′:6′,2″-terpyridine)platinum(II) chloride in micelles

Larew, Natalie A.; Wassen, Abigail R. Van; Wetzel, Katherine E.; Machala, Michael M.; Cummings, Scott D.

doi:10.1016/j.ica.2009.09.049

Cited by 10 publications

(5 citation statements)

References 73 publications

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“…The spectroscopy and applications of Pt(tpy)Cl + ( 3 ), where tpy = 2,2′:6′,2″-terpyridine, and its derivatives have been studied extensively over the past 50 years. − Yet, analogous Pt(tpy)X 3 + complexes have received little to no attention over the same period. − This is partly because of the susceptibility of these materials to thermal decomposition and photodecomposition, which makes them difficult to study, − but also because this class of compounds has been regarded as spectroscopically insignificant. However, the potential application of platinum(IV) complexes as photocytotoxic anticancer agents for precision drug delivery may renew interest in developing a better understanding of the fundamental spectroscopic properties and photochemistry of this class of compounds. ,− …”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Characterization of Platinum(IV) Terpyridyl Complexes

et al. 2019

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Pt(tpy)X3 + [X = Cl (1), Br (2); tpy = 2,2′:6′,2″-terpyridine] salts were prepared by the oxidative addition of Pt(tpy)X+ with X2 as originally reported by Morgan and Burstall in 1934. The complexes have been fully characterized by 1H NMR spectroscopy, elemental analysis, mass spectrometry, and X-ray crystallography. The electronic structures of 1 and 2 were investigated using absorption and emission spectroscopy, and the accumulated data are consistent with stabilization of the singlet ligand-centered and potentially singlet ligand field/singlet ligand-to-metal charge-transfer states for 1 and 2 compared to those for Pt(tpy)Cl+ (3) and Pt(tpy)Br+ (4). The changes in the lowest-energy-absorbing state result in drastic differences in the emission behavior among 1–4. Specifically, 1 emits from a lowest-energy state that appears to have triplet ligand field/triplet ligand-to-metal charge-transfer character, whereas 2 exhibits no appreciable emission between 400 and 800 nm.

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Section: Introductionmentioning

confidence: 99%

Spectroscopic Characterization of Platinum(IV) Terpyridyl Complexes

et al. 2019

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“…In addition, cationic Pt(II) complexes have been used as intercalators for duplex and G-quadruplex DNA. ,,− Cationic complexes have also been employed for preparing luminescent Langmuir–Blodgett films by attaching alkyl chains of suitable length on the coordinated tridentate ligand taking advantage of the aggregation properties of these square planar systems . Indeed, their tendency to self-assemble has been also exploited to form various aggregates, fibers, , gels, , liquid crystals, − and micelles . Recently, microcrystalline structures of cationic (N^N^N)-Pt(II) complexes have been created and used for improving the efficiency of electronic device performances, such as field effect transistors (FET). − As these self-assembled structures are highly ordered and can possess strong metal–metal interactions between adjacent molecules, conductivity can be modulated by exposure to vapors, which can influence the packing .…”

Section: Introductionmentioning

confidence: 99%

“…50 Indeed, their tendency to selfassemble has been also exploited to form various aggregates, 51 fibers, 52,53 gels, 54,55 liquid crystals, 56−59 and micelles. 60 Recently, microcrystalline structures of cationic (N^N^N)-Pt(II) complexes have been created and used for improving the efficiency of electronic device performances, such as field effect transistors (FET). 61−66 As these self-assembled structures are highly ordered and can possess strong metal−metal interactions between adjacent molecules, conductivity can be modulated by exposure to vapors, which can influence the packing.…”

Section: ■ Introductionmentioning

confidence: 99%

Tuning the Structural and Photophysical Properties of Cationic Pt(II) Complexes Bearing Neutral Bis(triazolyl)pyridine Ligands

et al. 2015

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The emission properties of a series of cationic Pt(II) complexes bearing neutral tridentate 2,6-bis-(1H-1,2,3-triazol-5-yl)pyridine and monoanionic ancillary ligands (Cl(-) or CN(-)) are described. By varying the substitution pattern on the 1,2,3-triazole moieties of the tridentate luminophore and the nature of the ancillary ligand, we were able to tune the intermolecular interactions between the complexes and therefore the electronic interactions between the metal centers. Indeed, all the compounds possessing Cl(-) as ancillary ligand are nonluminescent at room temperature, while the complexes containing CN(-) are luminescent. Interestingly, the π-accepting nature of this ancillary ligand induces Pt(II)-Pt(II) interactions irrespectively of bulky substitution patterns on the tridentate ligand.

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“…10 We also note that 4ÁCl was rendered light-emitting in micelles formed by SDS (sodium dodecyl sulfate) in water. 11 The self-assembly behavior of complexes 1ÁA, stemming from metallophilic PtÁ Á ÁPt and/or ligand-ligand interactions between solvophobic planar complex cations, allows us to prepare nanostructures of these complexes. Complex 1ÁA can be engineered into honeycomb mesostructures by using a breath figure (BF) method.…”

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confidence: 99%