Development of hydrophilic photolabile hydroxyl protecting groups

Abstract

Hydrophilic photolabile protecting groups (PPGs) for hydroxyl protection have been developed. The new PPGs are derived from 3-(dimethylamino)trityl (DMATr) by replacing the two methyl groups with two hydrophilic butyryl groups. The new PPG reagents can be readily prepared and installed. They are stable in the dark but can be removed cleanly and efficiently in aqueous environments upon irradiation with a UV lamp or sunlight.

A novel planar integration of all-solid-state capacitor and photodetector by an ultra-thin transparent sulfated TiO 2 film

“…Two absorption bands around 1128 and 1429 cm À 1 in the spectra of the sulfated TiO 2 films indicate clearly that the bidentate sulfate functional groups have been successfully modified on the TiO 2 nanoparticle surface [23,30,31,38]. The structure of the sulfate group on TiO 2 surface is described in Figure 2.…”

“…Similarly, the H 2 SO 4 sulfation treatment causes strong acidity for the sulfated TiO 2 that also promotes the protonation process [33,38,47]. Therefore the proton-electron double injecting/ expelling process may be the primary component that contributes to the capacitive current features of the sulfated TiO 2 .…”

Liquid crystal based electrolyte with light trapping scheme for enhancing photovoltaic performance of quasi-solid-state dye-sensitized solar cells

“…As the charge carrier, the transport of redox couple in the electrolyte would have a great effect on the performance of the DSC [26]. To characterize the influence of the liquid crystal on the transport of the redox couple in detail, the ion conductivity of the electrolyte was measured by impedance spectra.…”

Structural and physicochemical properties of 3-(3-carboxyphenylaminomethylene)-2-methoxychroman-4-one

“…The type of these products depends on nature of used amine and/or experimental conditions. According to literature reaction between 3-formylchromone and primary aromatic amine leads to a mixture of the 3-(aryliminomethyl)chromone and 2-arylamino-3-(arylaminomethylene)chroman-4-one what it causes that the isolation of pure compounds is difficult [11]. We synthesised pure derivatives of chromanones.…”

“…One of way to synthesis of chromanones is reaction between 3-formylchromone and amine. The reaction of 4-oxo-4H-1-benzopyran-3-carboxaldehyde and primary aromatic amines allows to obtain various types of products [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The type of these products depends on nature of used amine and/or experimental conditions.…”