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Photoluminescent properties of cadmium selenide in contact with solutions and films of metalloporphyrins. Evidence for semiconductor-mediated adduct formation of oxygen with metalloporphyrins at room temperature

Article Abstract:

The photoluminescence (PL) of cadmium selenide in contact with solutions and films of metalloporphyrins has been investigated. Single-crystal n-CdSe substrates were used in studying changes in the PL in methylene chloride solution from tetra-(4-tolyl)porphyrin, tetra-(4-pyridyl)-porphyrin, tetra(pentafluorophenyl)porphyrin, octaethylporphyrin and tetraphenylporphyrin. Results indicated that PL changes are significantly affected by changes in the dissolved gas ambient. This is an indication of adduct formation between oxygen and the metalloporphyrins at room temperature.

Analysis, Measurement, Cadmium, Porphyrins

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Adsorption of alkanolamines onto semiconductor surfaces: cadmium selenide photoluminescence as a probe of binding and film reactivity toward carbon dioxide

Article Abstract:

A study was conducted to analyze the adsorption of alkanolamines onto semiconductor surfaces, with emphasis on the use of cadmium selenide photoluminescence as a method of binding and film reactivity toward carbon dioxide. Steric and electronic factors contributing to film and solution photoluminescence effects were examined. Two forms of isotherm were utilized to determine quantitative estimates of analyte binding constants.

Carbon dioxide, Surfaces (Materials), Surfaces (Technology)

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Adsorption of DNA bases onto a semiconductor surface: evidence for surface-mediated promotion and detection of complementary base pair formation

Article Abstract:

It has been established that photoluminescence from CdSe substrates can be reversibly modulated by adsorption of adenine, guanine, thymine and cytosine and their complementary base pairs. In dimethyl sulfoxide, especially, the CdSe surface seems to encourage the formation of complementary base pairs .

Hydrogen bonding, Hydrogen bonds, Optical properties, Adsorption

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