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• W2338091626 endingPage "916" @default.
• W2338091626 startingPage "908" @default.
• W2338091626 abstract "Pigments from red coral (Corallium rubrum) and African snail (Helixia aspersa) shell were studied non-invasively using Raman spectroscopy with 1064-nm laser beam. The two observed bands because of organic pigments confined in biomineralized CaCO3 matrix at about 1500 and 1100 cm−1 were assigned to ν(CC) and ν(C―C), respectively. Both signals originate from polyene(s) of largely unknown structure, containing several conjugated CC bonds. The small peak at 1016 cm−1 in the Raman spectrum of coral pigment was assigned to in-plane ―CH3 rocking or structural deformation of polyene chain because of spatial confinement in the mineral matrix. The organic pigments in red coral and snail shell were present in inorganic matrix containing aragonite (shell) and calcite (coral). In addition, using Raman spectroscopy, it was observed that aragonite was replaced by calcite as result of healing damaged parts of snail shell. This is an important finding which indicates a great potential of nondestructive Raman spectroscopy instead of X-ray technique, as a diagnostic tool in environmental studies. To support analysis of the observed Raman spectra detailed calculations using density functional theory (DFT with B3LYP and BLYP density functionals) on structure and vibrations of model all-trans polyenes were undertaken. DFT calculated CC and C―C stretching frequencies for all-trans polyenes containing from 2 to 14 CC units were compared with the observed ν(CC) and ν(C―C) band positions of the studied coral and shell. Individual correction factors were used to better match theoretical wavenumbers with observed band positions in red coral and African snail. It was concluded that all-trans polyene pigments of red coral and dark parts of African snail shell contain 11–12 and 14 CC double bond units, respectively. However, Raman spectroscopy cannot produce any clear information on the presence and nature of the end-chain substituents in the studied pigments. Copyright © 2016 John Wiley & Sons, Ltd." @default.
• W2338091626 created "2016-06-24" @default.
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• W2338091626 date "2016-04-08" @default.
• W2338091626 modified "2023-09-27" @default.
• W2338091626 title "Modeling red coral (<i>Corallium rubrum</i>) and African snail (<i>Helixia aspersa</i>) shell pigments: Raman spectroscopy<i>versus</i>DFT studies" @default.
• W2338091626 cites W1516933842 @default.
• W2338091626 cites W1778780961 @default.
• W2338091626 cites W1878643615 @default.
• W2338091626 cites W1892920515 @default.
• W2338091626 cites W1964994249 @default.
• W2338091626 cites W1966865053 @default.
• W2338091626 cites W1971275758 @default.
• W2338091626 cites W1971499821 @default.
• W2338091626 cites W1972295548 @default.
• W2338091626 cites W1973371075 @default.
• W2338091626 cites W1973875163 @default.
• W2338091626 cites W1979750033 @default.
• W2338091626 cites W1981441030 @default.
• W2338091626 cites W1981556403 @default.
• W2338091626 cites W1982828790 @default.
• W2338091626 cites W1984614201 @default.
• W2338091626 cites W1988035133 @default.
• W2338091626 cites W1990228485 @default.
• W2338091626 cites W1990317838 @default.
• W2338091626 cites W1993921780 @default.
• W2338091626 cites W1994074462 @default.
• W2338091626 cites W1999386585 @default.
• W2338091626 cites W1999913663 @default.
• W2338091626 cites W2000467478 @default.
• W2338091626 cites W2000525023 @default.
• W2338091626 cites W2011368581 @default.
• W2338091626 cites W2012335982 @default.
• W2338091626 cites W2012787210 @default.
• W2338091626 cites W2014561627 @default.
• W2338091626 cites W2020529424 @default.
• W2338091626 cites W2023271753 @default.
• W2338091626 cites W2025321141 @default.
• W2338091626 cites W2025558367 @default.
• W2338091626 cites W2028333654 @default.
• W2338091626 cites W2029805969 @default.
• W2338091626 cites W2030976617 @default.
• W2338091626 cites W2034662951 @default.
• W2338091626 cites W2035046825 @default.
• W2338091626 cites W2040954437 @default.
• W2338091626 cites W2044422167 @default.
• W2338091626 cites W2044877714 @default.
• W2338091626 cites W2046747822 @default.
• W2338091626 cites W2047584186 @default.
• W2338091626 cites W2047657655 @default.
• W2338091626 cites W2048821415 @default.
• W2338091626 cites W2049647761 @default.
• W2338091626 cites W2049996223 @default.
• W2338091626 cites W2050409282 @default.
• W2338091626 cites W2053884081 @default.
• W2338091626 cites W2054386631 @default.
• W2338091626 cites W2057830963 @default.
• W2338091626 cites W2060034805 @default.
• W2338091626 cites W2070033652 @default.
• W2338091626 cites W2071135729 @default.
• W2338091626 cites W2075486327 @default.
• W2338091626 cites W2084304229 @default.
• W2338091626 cites W2086727209 @default.
• W2338091626 cites W2086957099 @default.
• W2338091626 cites W2089118529 @default.
• W2338091626 cites W2092110748 @default.
• W2338091626 cites W2111053540 @default.
• W2338091626 cites W2118269310 @default.
• W2338091626 cites W2125704002 @default.
• W2338091626 cites W2128595978 @default.
• W2338091626 cites W2129579634 @default.
• W2338091626 cites W2133901065 @default.
• W2338091626 cites W2143981217 @default.
• W2338091626 cites W2146330390 @default.
• W2338091626 cites W2156133029 @default.
• W2338091626 cites W2165255319 @default.
• W2338091626 cites W2168529586 @default.
• W2338091626 cites W2230728100 @default.
• W2338091626 cites W2238690006 @default.
• W2338091626 cites W2262217054 @default.
• W2338091626 cites W2313798581 @default.
• W2338091626 cites W2314346001 @default.
• W2338091626 cites W2316030951 @default.
• W2338091626 cites W2320242697 @default.
• W2338091626 cites W2322360847 @default.
• W2338091626 cites W2328473766 @default.
• W2338091626 cites W2331763557 @default.
• W2338091626 cites W2333898474 @default.
• W2338091626 cites W2335493071 @default.
• W2338091626 cites W4253720036 @default.
• W2338091626 doi "https://doi.org/10.1002/jrs.4922" @default.

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