A5008205291- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organometallic Complex Synthesis and Catalysis
- Metal complexes synthesis and properties
- Magnetism in coordination complexes
- Organic Light-Emitting Diodes Research
- Ferrocene Chemistry and Applications
- Catalytic Cross-Coupling Reactions
- Crystallography and molecular interactions
- Catalytic Alkyne Reactions
- Catalytic C–H Functionalization Methods
- Asymmetric Hydrogenation and Catalysis
- Lanthanide and Transition Metal Complexes
- Climate Change and Health Impacts
- Click Chemistry and Applications
- Multicomponent Synthesis of Heterocycles
- Synthesis and biological activity
- Oxidative Organic Chemistry Reactions
- Health disparities and outcomes
- Global Health Care Issues
- Radical Photochemical Reactions
- Electrocatalysts for Energy Conversion
- Inorganic Fluorides and Related Compounds
- Fluorine in Organic Chemistry
- Metal-Organic Frameworks: Synthesis and Applications
Institute for Advanced Studies in Basic Sciences
2015-2024
Polytechnic University of Bari
2023
University of Arkansas at Fayetteville
2018-2021
University of Zanjan
2016-2019
Universidad de La Rioja
2013-2016
Shiraz University
2007-2012
A new covalent organic framework (COF) based on imine bonds was assembled from 2-(4-formylphenyl)-5-formylpyridine and 1,3,6,8-tetrakis(4-aminophenyl)pyrene, which showed an interesting dual-pore structure with high crystallinity. Postmetallation of the COF Pt occurred selectively at N donor (imine pyridyl) in larger pores. The metallated served as excellent recyclable heterogeneous photocatalyst for decarboxylative difluoroalkylation oxidative cyclization reactions.
Mononuclear complexes [Pt(ppy)(S∧S)] (1a, S∧S = O,O′-di(cyclohexyl)dithiophosphate (ctp); 2a, O,O′-di(butyl)dithiophosphate (btp)) and [Pt(bzq)(S∧S)] (1b, ctp; 2b, btp) have been prepared by the reaction of precursor [Pt(C∧N)Cl(dmso)], C∧N deprotonated form 2-phenylpyrdine (ppy) 7,8-benzoquinoline (bzq), potassium salt ligands. All were characterized NMR spectroscopy, structure 2b was further identified single crystal X-ray determination. Although are not luminescent in solution at ambient...
Two types of Pt2Pb luminescent clusters were successfully prepared by the reaction [Pt(C6F5)(bzq)(OCMe2)] (1) and [Pt(C6F5)(ppy)(dmso)] (2) with [Pb(SpyR-5)2] (R = H, CF3). Thus, whereas 5 (ppy, Spy) is generated through coordination pyridine-N atoms to Pt centers, formation 3, 4 (bzq), 6 SpyCF3) accompanied a formal thiolate transfer from PbII PtII, keeping two N in primary environment lead. In 5, neutral Pb center adopts rather stable symmetrical "Pt2S2" sphere supplemented Pb··Fo...
The known cyclometalated platinum(II) complex [Pt(ppy)(DMSO)(Cl)] ( A ) in which ppy = 2‐phenylpyridinate, was treated with 2‐(diphenylphosphino)pyridine (PPh 2 py, PN) (1 equiv.) and readily afforded [Pt(ppy)(PPh py‐κ1P)(Cl)] 1 ). transphobia effect (T) single‐crystal X‐ray diffraction crystallography confirmed that the phosphine ligand is located trans to nitrogen atom of cyclometalating fragment (ppy). Compound various thiolate reagents at room temperature, leading displacement chloride...
Abstract Cyclometalated rollover complexes of the type [PtMe(κ 2 N , C ‐bipyO‐H)(L)] [bipyO‐H=cyclometalated 2,2′‐bipyridine ‐oxide; L=tricyclohexylphosphine (PCy 3 a ), 2‐(diphenylphosphino)pyridine (PPh py, b P(OPh) ( c )] were synthesized by treating ‐bipyO‐H)(SMe 1 ) with various monodentate phosphine and phosphite ligands. These characterized NMR spectroscopy, structure was confirmed single‐crystal X‐ray diffraction. Complex treated bis(diphenylphosphino)methane (dppm) at 1:1 ratio to...
The luminescent properties of cycloplatinated complexes containing aryl and SMe<sub>2</sub> ligands, [Pt(<italic>p</italic>-MeC<sub>6</sub>H<sub>4</sub>)(ĈN)(SMe<sub>2</sub>)], (ĈN = benzo[<italic>h</italic>]quinolate (bzq), <bold>1</bold>, or 2-phenylpyridinate (ppy), <bold>2</bold>), were investigated in solution solid state.
Platinum solvate complexes [Pt(C6F5)(C^N)(S)] [C^N = phenylpyridinyl (ppy), S dimethyl sulfoxide (DMSO) (A); C^N benzoquinolinyl (bzq), CH3COCH3 (B)] react with [Tl(Spy)] (Spy 2-pyridinethiolate) to afford binuclear [{Pt(C6F5)(C^N)}Tl(Spy)] ppy (1) and bzq (2)] species containing a Pt-Tl bonding interaction, supported by μ-Spy-κN,S bridging ligand, as confirmed X-ray diffraction. However, the related reactions [Tl(SpyCF3-5)] [SpyCF3-5 5-(trifluoromethyl)-2-pyridinethiolate] give neutral...
Au(<sc>i</sc>) complexes with PPh<sub>2</sub>py and thiolate ligands are prepared. The shown considerable cytotoxic activities those efficiently inhibit the TrxRs GR.
Reactions of SnX2 (X = Cl, Br) with [PtMe2(bipy)], 1, (bipy 2,2′-bipyridine), followed by NaBH4 reduction at the toluene/water interface in presence or absence graphene oxide support rendered PtSn nanoalloy thin films. They were characterized powder X-ray diffraction, photoelectron spectroscopy, and transmission electron microscopy. The electrocatalytical activity films was investigated methanol oxidation reaction. Our studies showed that PtSn/reduced-graphene (RGO) film gave better...
We describe the newest approach to photodynamic therapy (PDT) using metal-organic frameworks (MOFs) and covalent organic (COFs). PDT's characteristic method of treating cancer as noninvasive selective has garnered much attention. PDT entered realm nanotechnology overcome various challenges that are hindering its effectiveness. Porous materials, which more functional than small molecules, being explored platforms for PDT. MOFs at forefront these investigations, anti-tumor ability...
Cycloplatinated(<sc>ii</sc>) complexes <bold>1–4</bold> were synthesized and characterized. All exhibit strong luminescence except <bold>3</bold>.
A class of cyclometalated RhIII complexes [Cp*Rh(ppy)(SR)] bearing thiolate ligands, Cp* = pentamethylcyclopentadienyl, ppy 2-phenylpyridinate, and R pyridyl (Spy, 2), pyrimidyl (SpyN, 3), benzimidazolyl (Sbi, 4), benzothiazolyl (Sbt, 5), were produced identified by means spectroscopic methods. The in vitro cytotoxicity the compounds three different human mortal cancerous cell lines (ovarian, SKOV3; breast, MCF-7; lung, A549) a normal lung (MRC-5) line evaluated, indicating selectivity these...
The kinetics and mechanism of the reaction cyclometalated complexes [PtAr(C−N)(SMe2)], 1, in which Ar is Ph, p-MeC6H4, or p-MeOC6H4, C−N either ppy (deprotonated 2-phenylpyridine) bhq benzo[h]quinoline), with 1,1′-bis(diphenylphosphino)ferrocene, dppf, were studied using UV−visible 31P NMR spectroscopies. When 0.5 equiv dppf was added, binuclear Pt(II) complex [Pt2Ar2(C−N)2(μ-dppf)], 2, formed a good yield. fully characterized multinuclear (1H, 31P, 195Pt) spectroscopy, structure...
Complexes [Pt(C^N)(PPh3)Cl] (C^N = bzq (7,8-benzoquinolinyl, A) and ppy (2-phenylpyridinyl, B)) were reacted with various thiolate ligands to afford complexes [Pt(C^N)(PPh3)(κ1-S-SR)], C^N bzq, R SPh (thiophenolate, 1a); ppy, (1b); Spy (pyridine-2-thiolate, 2a); (2b); SpyN (pyrimidine-2-thiolate, 3a); (3b). 1-3 characterized by NMR spectroscopy, the solid-state structures of 1a 2a determined X-ray diffraction methods. Replacing a chloride ligand electron-rich thiolates changes lowest energy...
Cycloplatinated(<sc>ii</sc>) complexes containing dppf ligand were prepared. These exhibited high cytotoxicity and apoptosis-inducing activities to human cancer cell lines.
In the present work, a series of aryl‐cycloplatinated(II) complexes with general formula [Pt(C ^ N)(Ar)(κ 1 ‐dppm)], , [C N = 7,8‐benzoquinolinyl (bzq) or 2‐phenylpyridinyl (ppy); Ar C 6 F 5 p ‐MeC H 4 dppm 1,1‐bis(diphenylphosphanyl)methane] was employed in reaction AuCl(SMe 2 ) order to generate heterobimetallic Pt II ‐Au I complexes, N)(Ar)(µ‐dppm)Au(Cl)], featuring bridge between metal centers. The expectation induce metallophilic character into excited state and reduce non‐radiative...
This work reports the synthesis and characterization of a new C^N-based cycloplatinated(II) fluoride complex, [Pt(ppy)(PPh3)F] (2; ppy = 2-phenylpyridinate), involving Pt–F bond. The complex is highly luminescent in green area with high quantum yield 94.6% at 77 K. A comparison study heavier halogen derivatives reveals descending emission order F > Cl Br I. Time-dependent density functional theory calculations ascribe decreased efficiency to decreasing trend an intraligand (IL) transition...
A kinetic study of the oxidative addition reaction diarylplatinum(II) complexes [Pt(p-MeC(6)H(4))(2)(NN)] (1a: NN = 1,10-phenanthroline (phen) and 1b: 4,4'-di-tert-butyl-2,2'-bipyridine ((t)Bu(2)bpy)) with MeI in ionic liquids 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([bmim][bta]) or tetrafluoroborate ([bmim][BF(4)]) is described. The reactions were investigated as a function concentration temperature under pseudo-first-order conditions using UV-vis spectroscopy...
We report a novel cluster, [{Pt(C6F5)(bzq)}2Pb(Spy)2] 1, that displays reversible vapoluminescence to specific organic vapours; this behaviour can be related the stereochemical activity of lone pair around Pb(II) in ground state and distinct distortion coordination environment (1 1-solvent) upon photoexcitation.
To investigate the factors influencing luminescent properties of polymetallic cycloplatinated complexes a detailed study photophysical and structural heteronuclear [Pt2Me2(bhq)2(μ-dppy)2Ag2(μ-acetone)](BF4)2, 2, [PtMe(bhq)(dppy)Tl]PF6, 3, [Pt2Me2(bhq)2(dppy)2Tl]PF6, 4, [bhq = benzo[h]quinoline, dppy 2-(diphenylphosphino)pyridine] was conducted. Complexes 3 4 synthesized by reaction [PtMe(bhq)(dppy)], 1, with TlPF6 (1 or 1/2 equiv.) stabilized unsupported Pt–Tl bonds as revealed multinuclear...