Firmly attached: The short-circuit photocurrent density and conversion yields of solar cells based on pyridine-containing donor–acceptor π-conjugated (D-π-A) dyes (see scheme) are greater than those for conventional D-π-A dye sensitizers that bear a carboxy group as the electron-withdrawing anchoring group. attached to surface by coordinate bonding with Lewis acid sites TiO2. Detailed facts importance specialist readers published "Supporting Information". Such documents peer-reviewed, but...

A new-type of donor-acceptor π-conjugated (D-π-A) fluorescent dyes NI3-NI8 with a pyridine ring as electron-withdrawing-injecting anchoring group have been developed and their photovoltaic performances in dye-sensitized solar cells (DSSCs) are investigated. The short-circuit photocurrent densities energy-to-electricity conversion yields DSSCs based on greater than those for the conventional D-π-A dye sensitizers NI1 NI2 carboxyl electron-withdrawing group. IR spectra adsorbed TiO(2) indicate...

Anthracene-boronic acid ester as a new class of fluorescence PET sensors for detection trace amount water in organic solvents has been designed and developed.

Photoswitchable polymer adhesives enable strong bonding and on-demand debonding with minimal damage to adherends due the high spatiotemporal resolution therefore promise contribute material recycling as complex architectures consisting of dissimilar materials are being developed in various fields. In a variety photosystems, photoisomerization between noncharged spiropyran (SP) zwitterionic merocyanine (MC) large polarity changes is primary candidate because molecular dominant factor generate...

Molecular oxygen species formed on the surface of partially reduced TiO2 (rutile) nanoparticles have been studied by in situ electron spin resonance (ESR) and diffuse-reflectance spectroscopies. ESR signals due to O2− (gz = 2.020) Ti3+ appeared upon visible-light illumination at 77 K vanished raising temperature dark. The numbers radicals sub-band-gap were equal, suggesting a reversible transfer between peroxo O22− adjacent Ti4+ ion an vacancy site surface: Ti4+···O22−···Ti4+ → + O2−···Ti4+...

We describe the syntheses and characterization of a series periodic mesoporous organosilica (PMO) materials containing various organic functional groups prepared using direct synthesis method under basic conditions. This synthetic allows production organosilicas that have large surface areas contain several different groups, such as bridged amino, vinyl, ethyl, glycidoxypropyl, cyanopropyl units. Moreover, type organosilane used co-precursor has great influence on final particle shape...

A new class of fluorescence sensor for detection water in organic solvents based on photo-induced electron transfer (PET) anthracene coupled with an amino acid has been designed and developed.

D–π–A fluorescent dye YNI-2 with two pyridyl groups as an electron-withdrawing–injecting anchoring group possessing a high coordinate bonding ability to Lewis acid sites on the TiO2 surface, which can lead loading film and efficient electron injection, has been developed new type of sensitizer for dye-sensitized solar cells.

Adsorption of an organic dye having a pyridyl group as anchoring unit (NI4) is studied on nanocrystalline TiO2 surface by being compared with similar carboxyl anchor (NI2). both dyes followed Langmuir isotherm, and analysis the isotherms showed that adsorption equilibrium constant NI4 (1.1 ± 0.1) × 103 M–1, much smaller than (0.6 0.05) 105 M–1 for NI2, amounts adsorbed at saturation are to each other: [(1.5 0.2) (1.7 0.3)] 1014 cm–2 NI2 NI4, respectively. Coadsorption experiments 4-carboxy...

Gut befestigt: Die Photostromdichte und der Wirkungsgrad von Solarzellen auf Basis Pyridin-haltiger, π-konjugierter Donor-Akzeptor(D-π-A)-Farbstoffe (siehe Schema) übertreffen die Parameter herkömmlicher D-π-A-Farbstoffsensibilisatoren mit Carboxygruppen als elektronenziehender Ankergruppe. Farbstoffe sind über eine koordinative Bindung zu den Lewis-sauren Zentren TiO2 an Oberfläche befestigt. Detailed facts of importance to specialist readers are published as "Supporting Information". Such...

Molecular photoswitches are extensively used as molecular machines because of the small structures, simple motions, and advantages light including high spatiotemporal resolution. Applications depend on mechanical responses, in other words, whether they can generate motions against forces actuators or be activated controlled by mechanophores. Sterically hindered stiff stilbene (HSS) is a promising photoswitch offering large hinge-like E/Z isomerization, thermal stability Z isomer, which...

A series of benzofuro[2,3-c]oxazolo[4,5-a]carbazole-type fluorescent dyes OH1, OH2, OH4, OH7, and OH17 with carboxyl groups on different positions a chromophore skeleton are synthesized applied to dye-sensitized solar cells (DSSCs) as new class donor-π-acceptor (D-π-A) photosensitizers. In the dye group acts not only anchoring for attachment TiO2 surface but also electron acceptor. For other hand, is an group, acceptor cyano group. The has two groups, which located at same those OH1 OH7....

Molecular photoswitches have been widely used as molecular machines in various fields due to the small structures and simple motions generated reversible isomerization. However, common photoswitches, represented by azobenzene (AB), cannot combine both large high thermal stability, which are critically important for some practical applications addition photoisomerization yields. Here, we focus on a promising photoswitch, stiff stilbene (SS), its derivative, sterically hindered SS (HSS). The...

Since the groundbreaking discovery of polyacetylene films in 1960s and subsequent efforts to enhance their electrical conductivity through halogen doping, several conductive π-conjugated polymers have been developed applied fabrication smart windows, organic photovoltaic cells, lithium-ion batteries, other optoelectronic devices. Recently, potential these for use thermoelectric devices toward waste-heat recovery has drawn considerable attention. Given that properties conducting are strongly...

A novel family of photo‐and electroactive amorphous molecular materials containing an oligothiophene moiety linked to two triphenylamine moieties has been designed and synthesized (see Figure). Their glass‐forming properties, morphological changes, molecualr solid‐state properties are described. They reported exhibit multiredox behavior on electrochemical oxidation. magnified image

Abstract As new‐type donor–acceptor π‐conjugated dyes capable of forming a strong interaction between the electron‐acceptor moiety sensitizers and TiO 2 surface, fluorescent dye OH11 pyridinum OH12 with pyridine pyridinium ring as electron‐accepting group, respectively, have been designed synthesized photosensitizers for use in dye‐sensitized solar cells (DSSCs). The exhibits an absorption band at around 410 nm fluorescence 530 nm. On other hand, shows maximum 560 nm, assigned to...

Novel electrochemically-doped vinyl polymers containing 2,2‘:5‘,2‘‘:5‘‘,2‘‘‘-quaterthiophene, 4‘,3‘‘‘-dioctyl-2,2‘:5‘,2‘‘:5‘‘,2‘‘‘:5‘‘‘,2‘‘‘‘-quinquethiophene, and 4‘,3‘‘‘‘-dioctyl-2,2‘:5‘,2‘‘:5‘‘,2‘‘‘:5‘‘‘,2‘‘‘‘:5‘‘‘‘,2‘‘‘‘‘-sexithiophene as pendant groups were prepared by anodic polymerizations of the corresponding new monomers in presence tetra-n-butylammonium perchlorate a supporting electrolyte, their electrical electrochromic properties investigated. The polymers, which obtained...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of a Novel Type Electrochemically Doped Vinyl Polymer Containing Pendant Terthiophene and Its Electrical Electrochromic PropertiesKazunari Nawa, Ichiro Imae, Naoki Noma, Yasuhiko ShirotaCite this: Macromolecules 1995, 28, 3, 723–729Publication Date (Print):January 1, 1995Publication History Published online1 May 2002Published inissue 1 January...

The photoluminescence spectrum of newly synthesized octakis[2-(carbazol-9-yl)ethyldimethylsiloxy]silsesquioxane in the solid state shows a strong monomeric emission peak, which suggests suppression formation excimers even state.