The interactions of two organoplatinum complexes, [Pt(C∧N)Cl(dppa)], 1, and [Pt(C∧N)Cl(dppm)], 2 (C∧N = N(1), C(2′)-chelated, deprotonated 2-phenylpyridine, dppa bis(diphenylphosphino)amine, dppm bis(diphenylphosphino)methane), as antitumor agents, with bovine serum albumin (BSA) human (HSA) have been studied by fluorescence UV–vis absorption spectroscopic techniques at pH 7.40. quenching constants binding parameters (binding number sites) were determined method. obtained results revealed...

New complexes [Pt(C(∧)N)Cl(dppa)] (1), and [Pt(C(∧)N)Cl(dppm)] (2), (C(∧)N. deprotonated 2-phenylpyridine; dppa. bis(diphenylphosphino)amine; dppm. bis(diphenylphosphino)methane) were suggested to have pentacoordinated geometry as investigated by NMR conductometry. Pharmacological effects of 1 2 evaluated for their proteasome-inhibitory apoptosis-inducing activities under in vitro vivo conditions, showing significant activity against purified 20S proteasome, while demonstrated superior...

Abstract This study introduces an innovative experimental approach to enhance oil recovery from liquid-rich shale reservoirs using nanofluidic devices that simulate the nano-scale pore structures of unconventional reservoirs. Shale formations present unique challenges for due their ultra-tight nature, nano-sized pores, and pronounced surface-fluid interactions. Traditional enhanced (EOR) methods struggle overcome high capillary pressures confinement effects prevalent at this scale....

A new method has been developed to prepare [(Ph3P)3Ru(CO)(H)2] (1), an important homogeneous catalyst, directly from RuCl3·xH2O. Unlike previously reported procedures make 1, the does not utilize toxic and hazardous materials such as formaldehyde benzene requires only a small excess of PPh3, while furnishing analytically spectroscopically pure 1 in unprecedented >95% yield. The solvent (EtOH) is used quantities, thereby enabling scalability, demonstrated by preparing >17 g one batch.

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...

X-ray analysis of [(Ph3P)4Ru(H)2] (1) prepared by a literature procedure [Young, R.; Wilkinson, G. Inorg. Synth. 1990, 28, 337] shows that 1 is cocrystallized with PPh3, explaining the previously reported observations free phosphine in solutions 1. Lattice PPh3-free forms have also been obtained, structurally characterized, and found to generate small quantities uncoordinated PPh3 another species (A) solution. Against previous beliefs, however, A not [(Ph3P)3Ru(H)2] (2), but...

Two tetranuclear Au2Cu2 cluster complexes [Au2Cu2(μ-(PPh2)2py)2(μ-OH)](PF6)3, 2, and [Au2Cu2Cl2(μ-(PPh2)2 py)2](OTf)2, 4, have been prepared by the reactions of precursor [Au2(μ-(PPh2)2py)2](OTf)2, 1, [Cu2(μ-(PPh2)2py)2(μ-SMe2)(OTf)2], 3, with [Cu(NCCH3)4]PF6 AuCl(SMe2), respectively. The crystal structures 2 4 were determined X-ray crystallography, indicating a butterfly-shaped metal core for planar-shaped 4. In complex Cu atoms occupy edge-sharing bond, while in alternating Au tetragon...

An unprecedented example of a platinum(II) complex with simultaneous formation intermolecular NH⋯I–Pt and CH⋯I–Pt H-bondings (with neighboring platinum center) an intramolecular CH⋯Pt hydrogen bonding in solid state is described. There are indications showing that the solution probably forms different kind H-bonding type interaction.

[(Ph3P)3Ru(L)(H)2] (where L = H2 (1) in the presence of styrene, Ph3P (3), and N2 (4)) cleave Ph-X bond (X Cl, Br, I) at RT to give [(Ph3P)3RuH(X)] (2) PhH. A combined experimental DFT study points [(Ph3P)3Ru(H)2] as reactive species generated upon spontaneous loss from 3 4. The reaction with excess PhI displays striking kinetics which initially appears zeroth order Ru. However mechanistic studies reveal that this is due autocatalysis comprising two factors: 1) complex 2, originating initial...

A mixture of the platinum(0) complex [Pt(PtBu3)2] and tetrakis(acetonitrile)copper(i) hexafluorophosphate in acetone activated a water molecule gave hydride platinum(ii) [PtH(CH3CN)(PtBu3)2]PF6, 1, hydroxide Cu(i) species. The crystal structure 1 was determined by X-ray crystallography, indicating distorted square planar geometry around platinum center. Although three possible mechanisms are proposed for this transformation, monitoring reaction using NMR spectroscopy at low temperature...

Micellization (formation of wormlike structures) 3-(<italic>N</italic>-erucamidopropyl-<italic>N</italic>,<italic>N</italic>-dimethyl ammonium)propane sulfonate (EDAS) in the presence an inorganic salt, iron chloride (FeCl₃), acidic conditions is studied using static and dynamic rheological measurements small-angle X-ray scattering (SAXS).

A new type of aggregation-induced emission (AIE) luminogen containing a dimeric metal fragment and two or three phthalazine ligands is described, which shows dynamic motions around the centers in solution. Based on variable-temperature EXSY NMR spectroscopy data, X-ray crystallography structures, computational results, different pathways (i.e., reversible exchange with haptotropic shifts, circulation fragment, walking spot centers) were considered for this behavior. Restriction these...

The origin of the stability bulk Nanobubbles (NBs) has been object scrutiny in recent years. interplay between surface charge on NBs and Laplace pressure resulting from tension at solvent-NB interface often evoked to explain dispersed NBs. While is well understood community, nature remained obscure. In this work, we aim show that solvent present ions can effectively polarize NB by inducing a dipole moment, which turn controls stability. We polarizability gas polarity dispersing control...

The preparation of an unsupported tetranuclear cluster with a linear Pt(0)-Tl(I)-Tl(I)-Pt(0) metal chain is described. complex shows strong red emission in the solid state, having quantum yield 73%. Density functional theory (DFT) and time-dependent DFT calculations show that originated from platinum to thallium-thallium charge-transfer excited state.

Abstract Viscoelastic surfactants (VES) were introduced to apply in hydraulic fracturing fluids as a proppant carrier order replace polymers which possess high potential for formation damage. Yet, VES technology is limited by its low thermal stability and leak-off behavior permeability formations. This study aims design novel based fluid assisted functionalized carbon nanotubes (CNT) enhance rheological properties extend stability. Two types of VESs tested the present study. Viscosity...

The six-coordinated silver(I) complex [Au2Ag(μ-(PPh2)2py)2(OTf)2](OTf), 4 (py = pyridine, OTf CF3SO3), and the five-coordinated [Au2Ag(acetone)(μ-(PPh2)2py)2](PF6)3, 6, were prepared by reaction of precursor complexes 1(OTf)2 1(PF6)2, in which 1 [Au2(μ-(PPh2)2py)2]2+, with equiv Ag(OTf) dichloromethane excess Ag(PF6) a mixture dichloromethane/acetone, respectively. Also, [Au2Ag(μ-(PPh2)2py)2(py)(OTf)](OTf)2, 5, was obtained pyridine. clusters 4-6 characterized using multinuclear NMR...

The preparation of two new azulene-based imine ligands N-(2,6-diisopropylphenyl)-6-tBu-1-azulenylmethaneimine, 3, and N-(2,6-diisopropylphenyl)-6-tBu-3-(2,6-diisopropylphenyliminomethyl)-1-azulenylmethaneimine, 4, is described. These display stimuli responsive emissive behavior their fluorescence can be switched on off by protonation neutralization with trifluoroacetic acid trimethylamine, respectively. cyclometalation the monoimine ligand platinum gave cyclometalated complex...

Abstract Viscoelastic surfactant (VES) have been successfully applied as acid-diversion fluids. However, high temperature, interaction of VES and Fe(III), addition alcohol-based additives, chelating agents all interfere with the apparent viscosity VES-based acid reduce its efficiency. In present study, interactions Fe(III) a new type system, which can be effectively for diversion at temperatures, were characterized. Viscosity measurements conducted on in presence different concentrations to...

Symmetrical and unsymmetrical biscyclometalated platinum(II) complexes [Pt(ptpy)2], 1, [Pt(ptpy)(bppy)], 2, in which ptpy = deprotonated 2-(p-tolyl)pyridine bppy 2-(3-bromophenyl)pyridine, have been prepared from the reaction between tris(pentafluorophenyl)borane, B(C6F5)3 1 equiv of monocyclometalated [PtMe(ptpy)(ptpyH)], B, [PtMe(ptpy)(bppyH)], C, respectively. The solid-state structures 2 determined by X-ray crystallography. with TlPF6 or [Au(PPh3)]OTF resulted production heteronuclear...