Effect of metal coordination on photocurrent response properties of a tetrathiafulvalene organogel film.

Organic low molecular weight gelators with a tetrathiafulvalene (TTF) unit have received considerable attention because the formed gels usually exhibit redox active response and conducting or semiconducting properties. However, to our knowledge, metal coordination systems have not been reported for TTF-derived gels up to date. We have designed and synthesized a series of TTF derivatives with a diamide-diamino moiety that can coordinate to specific metal ions with square coordination geometry.

Role of the coordination center in photocurrent behavior of a tetrathiafulvalene and metal complex dyad.

Small organic molecule-based compounds are considered to be promising materials in photoelectronics and high-performance optoelectronic devices. However, photoelectron conversion research based on functional organic molecule and metal complex dyads is very scarce. We design and prepare a series of compounds containing a tetrathiafulvalene (TTF) moiety substituted with pyridylmethylamide groups of formulas [Ni(acac)2L]·2CH3OH (1), [Cu2I2L2]·THF·2CH3CN (2), and [MnCl2L2]n·2nCH3CH2OH (3) (L = 4,5-bis(3-pyridylmethylamide)-4',5'-bimethylthio-tetrathiafulvalene, acac = acetylacetone) to study the role of the coordination center in photocurrent behavior.

Metal centered oxidation or ligand centered oxidation of metal dithiolene? Spectral, electrochemical and structural studies on a nickel-4-pyridine-1,2-dithiolate system.

The complex Et(4)N[Ni(4-pedt)(2)] (1) (4-pedt = 1-(pyridine-4-yl) ethylene-1,2-dithiolate) was synthesized to investigate the behaviour of metal dithiolene compounds upon protonation and oxidation by absorption spectroscopy, electrochemistry and structural analyses and to further understand the electronic states of the dithiolene compounds. It is unexpected that the 915 nm NIR transition band is not shifted when H(+) is added, and it is only affected (blue-shifted) when the compound is oxidized. All the evidence of electronic spectra indicates that the NIR band is relevant to the central [Ni(edt)(2)] moiety (edt = ethylenedithiolate), not the behaviour of individual Ni ions or ligands.

A redox active proton transfer and hydrogen-bonding system of tetrathiafulvalene-dicarboxylic acid and pyridine bases.

Hydrogen bonds are important in supramolecular chemistry and responsible for proton transfer processes. This manuscript reports new hydrogen-bonding systems of redox-active acid-base assemblies consisting of dimethylthio-tetrathiafulvalene dicarboxylic acid (H(2)L) coupled with pyridine (py), 2,2'-bipyridine (2,2'-bpy), and 4,4'-bipyridine (4,4'-bpy). The (1)H NMR chemical shifts of the pyridines and the redox potential shifts of the tetrathiafulvalene moiety indicate that proton-transfer and strong hydrogen-bonding interactions exist between the acid and the bases in aprotic solvents.

[An introduction of different positioning tests of benign paroxysmal positional vertigo and their clinical values].

Objective: To explore the clinical value of different positioning tests for different benign paroxysmal positional vertigo (BPPV).

Method: This research applies Dix-Hallpike test and Side-lying test for PC-BPPV, Roll test and WRW test for HC-BPPV, Dix-Hallpike test, Side-lying test and Rahko T maneuvers for SC-BPPV. Six hundred and thirteen cases, who were tested with different positioning tests in the sequence of firstly PC-BPPV then HC-BPPV and finally SC-BPPV, were randomly divided into 2 groups.

The treatment for postirradiation otitis media with effusion: a study of three methods.

Objective: To explore treatments for postirradiation otitis media with effusion (OME) in patients with nasopharyngeal carcinoma.

Study Design: This study is a prospective quasi-randomized clinical trial.

Methods: Ninety-six patients (135 ears) with OME after the first course of radiotherapy for nasopharyngeal carcinoma were divided into three groups: simple auripuncture plus aspiration, tympanic membrane fenestration with cauterization, and myringotomy plus grommet insertion.

Malformation of the external ear and facial paralysis caused by megatemperature hydro-aluminum.

We present a case of right lateral auricle contracture malformation, auricular canal atresia, and complete facial paralysis (House-Brackmann grade VI) caused by a megatemperature hydro-aluminum injury at work. The diastrophic auricle and auricular canal atresia were reshaped. The complete facial paralysis was reanimated to House-Brackmann grade III after surgical hypoglossal-facial end-to-end anastomosis.