Terpyridyl Acetylide Research Articles

A robust photocatalyst for 1O2-mediated oxidation of cyclopentadiene based on silica-supported platinum (II) terpyridyl complex

The oxo-functionalization of hydrocarbons is the most important type of reaction in organic chemical productions. Among various oxidizing reagents, more and more studies have focused on the employment of molecular oxygen as oxidizing species in order to realize innovative and economically advantageous process, and at the same time, move toward a “sustainable chemistry”. However, the reactivity of O2 with most organic molecules is inhibited by spin restriction mainly due to the triplet ground state of O2 molecule. Photosensitized oxidation holds a special promise, where O2 molecule can be efficiently activated by the excited triplet state of a photocatalyst through an energy transfer process that generates highly reactive singlet oxygen (O2). On the other hand, the production of chemicals by this type of photooxidation in a large scale is still limited. The main reasons are the stability of photosensitizers and their separation problems. Search for new photocatalysts capable of inducing high quantum yield of singlet oxygen (O2) with environment friendly and cheap reagent represents a major target from the synthetic and industrial point of view. Platinum (II) terpyridyl acetylide complex 1 (Fig. 1) is particularly attractive since it may photochemically generate O2 with a high quantum yield and absorbs light in visible region. Nevertheless, the appealing features are usually out-weighted by the relatively high costs of the catalysts, rending their application to synthesis impractical. Herein we report such a robust photosensitizer based on the silica-supported platinum (II) terpyridyl complex 1,

Photosensitized Oxidative Deprotection of Oximes to Their Corresponding Carbonyl Compounds by Platinum(II) Terpyridyl Acetylide Complex

Platinum(II) terpyridyl acetylide complex (1) photosensitizes the oxidation of aldoximes 2-4, aliphatic acyclic and cyclic ketoximes 5-7, and aromatic ketoximes 8-10 into their corresponding carbonyl compounds with good to excellent yields in acetonitrile solution. This deprotection of oximes proceeds via singlet oxygen ((1)O(2)) mechanism. The photosensitizer can be easily separated from the product and unreacted starting material by extraction with ethyl acetate and reused for photooxidation without loss of (1)O(2)-generation capacity.

Tuning the lowest excited-states of platinum (II) terpyridyl acetylide complex bearing azacrown moiety: Stimulated by transition metal ions

Tuning the lowest excited-states of platinum (II) terpyridyl acetylide complex bearing azacrown moiety: Stimulated by transition metal ions

Tuning the lowest excited-states of platinum (?) terpyridyl acetylide complex bearing azacrown moiety: Stimulated by transition metal ions

Tuning the lowest excited-states of platinum (?) terpyridyl acetylide complex bearing azacrown moiety: Stimulated by transition metal ions

A Novel Proton Sensor with Luminescence and Color Signaling Based on Platinum(II) Terpyridyl Acetylide Complex

AbstractA novel sensitive probe for proton based on platinum(II) terpyridyl acetylide complex by monitoring the changes both in luminescence and color is described.

Versatile Photosensitization System for 1O2‐Mediated Oxidation of Alkenes Based on Nafion‐Supported Platinum(II) Terpyridyl Acetylide Complex.

Platinum(II) terpyridyl acetylide complex (1) was incorporated into Nafion membranes as a photosensitizer, and the Nafion was immersed in an aqueous or organic solution of 7-dehydrocholesterol, α-pinene, or cyclopentadiene. This photosensitizer system can generate singlet oxygen (1O2) in high quantum yield to oxidize the alkenes in the solution outside the Nafion and can be easily removed from the reaction vessel at the end of the photooxidation.

Versatile photosensitization system for 1O2-mediated oxidation of alkenes based on nafion-supported platinum(II) terpyridyl acetylide complex.

[structure: see text] Platinum(II) terpyridyl acetylide complex (1) was incorporated into Nafion membranes as a photosensitizer, and the Nafion was immersed in an aqueous or organic solution of 7-dehydrocholesterol, alpha-pinene, or cyclopentadiene. This photosensitizer system can generate singlet oxygen ((1)O(2)) in high quantum yield to oxidize the alkenes in the solution outside the Nafion and can be easily removed from the reaction vessel at the end of the photooxidation.

Long-lived emission from platinum(II) terpyridyl acetylide complexes.

Photoluminescence with high quantum yield and long lifetime from a triplet metal-to-ligand charge transfer (MLCT) excited state in fluid solution at room temperature has been observed for a series of platinum(II) 4'-p-tolyl-terpyridyl acetylide complexes.

Synthesis, Luminescence, Electrochemistry, and Ion-Binding Studies of Platinum(II) Terpyridyl Acetylide Complexes

A series of platinum(II) terpyridyl acetylide complexes, [Pt(trpy)(C⋮CR)]PF6 (R = C6H5, C6H4Cl-4, C6H4CH3-4, C6H4OCH3-4, C6H4NO2-4, benzo-15-crown-5, C6H3-(OCH3)2-3,4), have been synthesized and characterized. Their luminescence and electrochemical behaviors have been studied. The ion-binding properties of [Pt(trpy)(C⋮C-benzo-15-crown-5)]PF6 and the X-ray crystal structure of [Pt(trpy)(C⋮CC6H5)]PF6 are also reported.