PlatinumII Acetylide Photophysics

Muro, Maria L.; Rachford, Aaron A.; Wang, Xianghuai; Castellano, Felix N.

doi:10.1007/3418_2009_1

Cited by 22 publications

(34 citation statements)

References 101 publications

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“…As studied in detail by Castellano, Yam and Che, among others, Pt acetylides have a rich photochemistry. Absorption bands at λ <400 nm are intraligand π→π* transitions, and bands at lower energies correspond to 1 [dπ(Pt)→π*(tpy)] metal‐to‐ligand charge transfers ( 1 MLCT) and a combination of overlapping 1 MLCT and 1 [π(C≡CR)→π*(tpy)] ligand‐to‐ligand ( 1 LLCT) transitions.…”

Section: Resultsmentioning

confidence: 95%

Directional Self‐Sorting with Cucurbit[8]uril Controlled by Allosteric π–π and Metal–Metal Interactions

Kotturi

Masson

2018

Chemistry A European J

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To maximize Coulombic interactions, cucurbit[8]uril (CB[8]) typically forms ternary complexes that distribute the positive charges of the pair of guests (if any) over both carbonylated portals of the macrocycle. We present here the first exception to this recognition pattern. Platinum(II) acetylides flanked by 4'-substituted terpyridyl ligands (tpy) form 2:1 complexes with CB[8] in an exclusively stacked head-to-head orientation in a water/acetonitrile mixture. The host encapsulates the pair of tpy substituents, and both positive Pt centers sit on top of each other at the same CB[8] rim, leaving the other rim free of any interaction with the guests. This dramatic charge imbalance between the CB[8] rims would be electrostatically penalizing, were it not for allosteric π-π interactions between the stacked tpy ligands, and possible metal-metal interactions between both Pt centers. When both tpy and acetylides are substituted with aryl units, the metal-ligand complexes form 2:2 assemblies with CB[8] in aqueous medium, and the directionality of the assembly (head-to-head or head-to-tail) can be controlled, both kinetically and thermodynamically.

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Section: Resultsmentioning

confidence: 95%

Directional Self‐Sorting with Cucurbit[8]uril Controlled by Allosteric π–π and Metal–Metal Interactions

Kotturi

Masson

2018

Chemistry A European J

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“…Moreover, the perpendicular orientation of the C^C-aryl group to the Pt coordination plane might be also affecting the cytotoxic character. Furthermore, the different methyl substitution on the aromatic ring (orto (82), meta (83), para (84)) barely affected the antiproliferative behavior. Alternatively, differences were found in the case of the nitro group, being the orto substituted (85) the less active species.…”

Section: Alkynyl Platinum Complexes With Cod Ligandsmentioning

confidence: 99%

“…81 Moreover, in general they have rich photophysical properties that allows the use of fluorescence techniques, for assessing their biodistribution. 82 Consequently, they are potential candidates for novel trackable anticancer agents. Examination of different C^N^N-ortometallated platinum complexes containing alkynyl (90 and 91) or chloride (90a and 91a) units as ancillary ligands revealed that the presence of the labile chloride was critical.…”

Section: Alkynyl Platinum Complexes With Planar Polyaromatic Ligandsmentioning

confidence: 99%

Gold and platinum alkynyl complexes for biomedical applications

Cerrada

Fernández‐Moreira

Gimeno

2019

Advances in Organometallic Chemistry

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“…In the framework of platinum chemistry, the interaction of terminal alkynes with mono-or binuclear complexes has been an intense area of research in connection with their involvement in many insertion, coupling and polymerizations reactions [5][6][7][8][9][10]. On the other hand, platinum alkynyl complexes have been attracting widespread interest for several years, mainly due to their structural variety, remarkable reactivity and photophysical properties [11][12][13][14][15][16][17][18].…”

Section: Scheme 1 Reactivity Of Complex 1 With Brønsted Acidsmentioning

confidence: 99%

A Hydrido η1-Alkynyl Diplatinum Complex Obtained from a Phosphinito Phosphanido Complex and Trimethylsilylacetylene

et al. 2014

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The reaction of (trimethylsilyl)acetylene with the phosphinito phosphanido Pt(I) complex [(PHCy2)Pt(μ-PCy2){κ 2 P,O-μ-P(O)Cy2}Pt(PHCy2)](Pt-Pt) (1) results in the protonation of the Pt-Pt bond with the formation of the bridging hydride complex [(PHCy2)(Me3SiC≡C)Pt(μ-PCy2)(μ-H) Pt(PHCy2){κP-P(O)Cy2}](Pt-Pt) (2), which was characterized by spectroscopic, spectrometric and XRD analyses. Complex 2 exhibits in the solid state at 77 K a long-lived, weak, orange emission assigned as metal-metal to ligand charge transfer (MMLCT) (L = alkynyl) due to the presence of a very short Pt···Pt distance [2.8209(2) Å]. Reaction of 2 with etherate HBF4 results in the selective protonation of the phosphinito ligand to afford the species [(PHCy2)(Me3SiC≡C)Pt(μ-PCy2)(μ-H) Pt(PHCy2){κP-P(OH)Cy2}](Pt-Pt)[BF4] ([3]BF4).

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PlatinumII Acetylide Photophysics

Cited by 22 publications

References 101 publications

Directional Self‐Sorting with Cucurbit[8]uril Controlled by Allosteric π–π and Metal–Metal Interactions

Directional Self‐Sorting with Cucurbit[8]uril Controlled by Allosteric π–π and Metal–Metal Interactions

Gold and platinum alkynyl complexes for biomedical applications

A Hydrido η1-Alkynyl Diplatinum Complex Obtained from a Phosphinito Phosphanido Complex and Trimethylsilylacetylene

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