Gold nanoparticles have been stabilized with a phthalocyanine (Pc) photosensitizer. Transmission electron microscopy confirmed that the coated particles were in 2−4 nm size regime. Energy-dispersive X-ray analysis revealed Pc macrocycle was present on gold surface and also TOAB phase transfer reagent, used during synthesis, associated nanoparticles. The three-component (photosensitizer/gold/phase reagent) shown to generate singlet oxygen enhanced quantum yields as compared free Pc....

A series of 3,6-dialkylphthalonitriles and 3,6-bis(4,4,4-trimethoxybutyl) phthalonitrile have been prepared via Diels–Alder reactions 2,5-disubstituted furans or thiophene 1,1-dioxides with fumaro-nitrile. The phthalonitriles were converted into the title phthalocyanines as metal-free copper(II) derivatives. macrocycles characterised using 1H NMR optical spectroscopy, fast-atom bombardment mass spectrometry. Certain examples exhibit discotic liquid crystal behaviour.

Light-sensitive: Targeted photodynamic therapy is achieved by using gold nanoparticles that are stabilized a mixed monolayer of hydrophobic zinc phthalocyanine photosensitizer, which produces cytotoxic singlet oxygen, and water-soluble thiol-functionalized poly(ethylene glycol) carrying the lectin jacalin, targets Thomsen–Friedenreich disaccharide antigen at surface cancer cells.

Silicon nanoparticles (SiNPs) hold prominent interest in various aspects of biomedical applications. For this purpose, surface functionalization the NPs is essential to stabilize them, target them specific disease area, and allow selectively bind cells or bio-molecules present on cells. However, no such has been explored with Si nanoparticles. Carbohydrates play a critical role cell recognition. Here, we report first synthesis silicon functionalized carbohydrates. In study, stable brightly...

The synthesis of new families stable or at least spectroscopically observable gold(III) hydride complexes is reported, including anionic cis-hydrido chloride, hydrido aryl, and cis-dihydride complexes. Reactions between (C^C)AuCl(PR3) LiHBEt3 afford the first examples phosphino hydrides (C^C)AuH(PR3) (R = Me, Ph, p-tolyl; C^C 4,4′-di-tert-butylbiphenyl-2,2′-diyl). X-ray structure (C^C)AuH(PMe3) was determined. reacts with (C^C)AuCl(py) to give [(C^C)Au(H)Cl]−, whereas undergoes phosphine...

Abstract— The synthesis, characterization and electronic spectra of a series nine 1,4,8,11,15,18,22,25‐octa‐alkyl zinc phthalocyanines (ZnPc), potential photosensitizers for the photodynamic therapy cancer, are described. substituents on phthalocyanine (Pc) macrocycle “red‐shift” absorbance maximum, in cyclohexane, all members this to value 703 ± 2 nm, with corrected fluorescence emission maximum octadecyl derivative 715 nm. solubilities degree aggregation six examples cyclohexane have been...

Abstract The synthesis and characterization of hitherto hypothetical Au III π‐alkyne complexes is reported. Bonding stability depend strongly on the trans effect steric factors. characteristics shed light reasons for very different stabilities between classical alkyne Pt II their drastically more reactive congeners. Lack back‐bonding facilitates slippage, which energetically less costly gold than platinum explains propensity to facilitate C−C bond formation. Cycloaddition followed by aryl...

Abstract Controlled syntheses of phthalocyanine/benzoporphyrin hybrid structures have been achieved. We report a simple means for obtaining non‐peripherally octaalkyl‐substituted derivatives tetrabenzotriazaporphyrin (TBTAP), tetrabenzodiazaporphyrin (TBDAP), tetrabenzomonoazaporphyrin (TBMAP) and tetrabenzoporphyrin (TBP) macrocycles by treating 3,6‐dialkyl phthalonitriles with differing amounts the Grignard reagent MeMgBr. This range macrocyclic products is not obtained from corresponding...

Understanding the role of structural and environmental dynamics in excited state properties strongly coupled chromophores is paramount importance molecular photonics. Ultrafast, coherent, multidimensional spectroscopies have been utilized to investigate such simplest model system, dimer. Here, we present a half-broadband two-dimensional electronic spectroscopy (HB2DES) study previously reported ultrafast symmetry-breaking charge separation (SB-CS) subphthalocyanine oxo-bridged homodimer...

The development of new and improved photoswitches for photonic materials photo-pharmaceutics is an important research objective. Recently a family based on the rhodanine motif was described. In this work photophysics representative example that are investigated. photoswitch’s shown to be remarkably different to, more complex than, those observed closely related photoactive monomethines dyes, which typically relax in picoseconds by internal conversion. photoswitch allowed Franck-Condon...

Incorporation of fluorescent proteins (FPs) into biological systems has revolutionised bioimaging and the understanding cellular processes. Ongoing developments FPs are driving efforts to characterise fundamental photoactive unit...

I. Chambrier, M. J. Cook, Helliwell and A. K. Powell, Chem. Soc., Commun., 1992, 444 DOI: 10.1039/C39920000444

Bottom-gate, bottom-contact organic thin film transistors (OTFTs) were fabricated using solvent soluble copper 1,4,8,11,15,18,22,25-octakis(hexyl)phthalocyanine as the active semiconductor layer. The compound was deposited 70 nm thick spin-coated films onto gold source–drain electrodes supported on octadecyltrichlorosilane treated 250 SiO2 gate insulators. performance of OTFTs optimised by investigating effects vacuum annealing at temperatures between 50 °C and 200 °C, a range that included...

An X-ray crystal structure determination reveals that 1,4,8,11,15,18,22,25-octaisopentylphthalocyanine adopts a saddle conformation, geometry which shows modified spectroscopic properties and reduced photostability relative to planar ring structures.

The third-order nonlinear optical properties of a series 15 unmetallated and metallated 1,4,8,11,15,18,22,25-octaalkylphthalocyanines have been investigated. palladium-metallated compound is the strongest absorber series, but, due to its comparatively high linear absorption coefficient, it exhibits relatively low ratio excited- ground-state cross-sections (κ) when compared other compounds. highest values for κ were found derivatives with indium lead. nickel-metallated compounds are weakest...

A series of three Phthalocyanine (Pc) derivatives have been designed, synthesised and formulated as self-assembled monolayers (SAMs) on gold-coated optical waveguides. The alkyl chain tethering the Pc macrocycles to gold surface via a thiol moiety varied in length viz. (CH2)11, (CH2)8 (CH2)3. SAMs characterised using reflection absorption infrared spectroscopy fluorescence excited evanescent wave. data shown that tether has profound effect orientation packing density macrocycle surface....