singlet state

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Related to singlet: Singlet oxygen, Singlet state

sin·glet state

a transient, excited state of a molecule (for example, of chlorophyll, on absorbing light) in which a molecule can release energy as heat or light (fluorescence) and thus return to its initial (ground) state; it may alternatively assume a slightly more stable but still excited state (triplet state), with an electron still dislocated as before but with reversed spin.

singlet state

[sing′glit]
a state of an atom or molecule in which all electrons have paired spins.
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References in periodicals archive ?
Reactivity of the trap compounds, PEA 1 or NEA 2, with singlet oxygen inside Leishmania parasites was also examined by emission spectroscopy.
Artificial sources of radiation may also contribute to endogenous singlet oxygen formation in humans.
This panel of assays has led to the term, Oxygen Radical Absorbance Capacity using Multiple Radicals (ORAC-MR), which is a sum of the antioxidant capacity against six of the most predominant reactive species found in the human body: ROS (peroxyl radical, hydroxyl radical, superoxide anion, singlet oxygen), RNS (peroxynitrite) and RCS (hypochlorite).
The researchers find that the fission process happens as soon as just two of these molecules are in contact, and remarkably, that singlet fission is then completely efficient-so that every photon produces two triplets.
The requirements of an optimal photosensitizer include photo-physical, chemical, and biological characteristics: (i) highly selective tumor accumulation; (ii) low toxicity and fast elimination from the skin and epithelium; (iii) absorption peaks in the low-loss transmission window of biological tissues; (iv) optimum ratio of the fluorescence quantum yield to the interconversion quantum yield (The first parameter determines the photosensitizer diagnostic capabilities, and plays a key role in monitoring the photosensitizer accumulation in tissues and its elimination from them; the second parameter determines the photosensitizer ability to generate singlet oxygen.
Production of singlet oxygen-derived hydroxylradical adducts during merocyanine-540 mediated photosensitization: analysis by ESR-spin trapping and HPLC with electrochemical detection.
Keywords: Humulus lupulus; Acne-causing bacteria; Oxygen radical absorbance; Singlet oxygen absorbance; Matrix metalloproteinases; Xanthohumol
2+] ESR signal changes, as the temperature increases and it becomes six singlet line forms at 800[degrees]C.
Intended applications include photoluminescence, singlet oxygen measurement, LIDAR, Raman spectroscopy, cathodoluminescence, fluorescence, and fluorescence life time.
He was wearing a grey coloured singlet vest, three-quarter length navy blue shorts and white trainers.
Tokyo, Japan, Feb 15, 2007 - (JCN) - The National Institute of Advanced Industrial Science and Technology (AIST) announced their recent discovery that high-order fullerene C82 and metal-containing fullerene (both Nano-Carbons) can efficiently remove singlet oxygen (which causes oxidation).
Indeed, this novel technology has already been used in quantum cryptography and silicon microprocessor failure analysis, and has the potential to cross into applications such as singlet oxygen detection in biomedical research and Raman LIDAR for long-range toxic materials detection.