Fluorescence spectroscopy of synthetic melanin in solution

被引：26

作者：

Perna, G. ^{[1
]}

Frassanito, M. C. ^{[1
]}

Paiazzo, G. ^{[2
]}

Gallone, A. ^{[1
]}

Mallardi, A. ^{[3
]}

Biagi, P. F. ^{[4
]}

Capozzi, V. ^{[1
]}

机构：

[1] Univ Foggia, Dipartimento Sci Biomed, I-71100 Foggia, Italy

[2] Univ Bari, Dipartimento Chim, I-70126 Bari, Italy

[3] ICPS CNR, I-70126 Bari, Italy

[4] Univ Bari, Dipartimento Interateneo Fis, I-70126 Bari, Italy

来源：

JOURNAL OF LUMINESCENCE | 2009年 / 129卷 / 01期

关键词：

Eumelanin; Fluorescence; Physical properties; Optical properties; Biopolymers; X-RAY CHARACTERIZATION; RADIATIVE RELAXATION; BUILDING-BLOCKS; BAND-STRUCTURE; EUMELANIN; 5,6-INDOLEQUINONE; MICROSCOPY;

D O I：

10.1016/j.jlumin.2008.07.014

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a detailed investigation of fluorescence properties of synthetic eumelanin pigment in solution. A complete set of fluorescence spectra in the near-UV and visible range is analysed. Excitation spectra at a few selected emission energies are also investigated. Our measurements support the hypothesis that fluorescence in eumelanin is related to chemically distinct oligomeric units that can be selectively excited. Fluorescence due to large oligomer systems is spectrally differentiated from that due to monomers and small oligomer systems. Fluorescence excitation measurements show the contribution of 5,6-dihydroxyndole-2-carboxylic acid and 5,6-dihydroxyndole monomers to the emission of small-size oligomers. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：44 / 49

页数：6

共 27 条

[1] Fundamental building blocks of eumelanins: electronic properties of indolequinone-dimers
Bochenek, K
Gudowska-Nowak, E
[J]. CHEMICAL PHYSICS LETTERS, 2003, 373 (5-6) : 532 - 538
[2] X-RAY CHARACTERIZATION OF MELANINS .1.
CHENG, J
MOSS, SC
EISNER, M
ZSCHACK, P
[J]. PIGMENT CELL RESEARCH, 1994, 7 (04): : 255 - 262
[3] CHENG J, 1994, PIGM CELL RES, V7, P263, DOI 10.1111/j.1600-0749.1994.tb00061.x
[4] Ultrastructural organization of eumelanin from Sepia officinalis measured by atomic force microscopy
Clancy, CMR
Simon, JD
[J]. BIOCHEMISTRY, 2001, 40 (44) : 13353 - 13360
[5] Solution structure of copper ion-induced molecular aggregates of tyrosine melanin
Gallas, JM
Littrell, KC
Seifert, S
Zajac, GW
Thiyagarajan, P
[J]. BIOPHYSICAL JOURNAL, 1999, 77 (02) : 1135 - 1142
[6] FLUORESCENCE OF MELANIN DEPENDENCE UPON EXCITATION WAVELENGTH AND CONCENTRATION
GALLAS, JM
EISNER, M
[J]. PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1987, 45 (05) : 595 - 600
[7] THEORETICAL INVESTIGATION OF MODEL POLYMERS FOR EUMELANINS .1. FINITE AND INFINITE POLYMERS
GALVAO, DS
CALDAS, MJ
[J]. JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (04) : 2630 - 2636
[8] POLYMERIZATION OF 5,6-INDOLEQUINONE - A VIEW INTO THE BAND-STRUCTURE OF MELANINS
GALVAO, DS
CALDAS, MJ
[J]. JOURNAL OF CHEMICAL PHYSICS, 1988, 88 (06) : 4088 - 4091
[9] Building blocks of eumelanin: Relative stability and excitation energies of tautomers of 5,6-dihydroxyindole and 5,6-indolequinone
Il'ichev, YV
Simon, JD
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (29) : 7162 - 7171
[10] ON THE ORIGIN OF THE FREE RADICAL PROPERTY OF MELANINS
LONGUETHIGGINS, HC
[J]. ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS, 1960, 86 (02) : 231 - 232

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