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Items: 1 to 20 of 136

1.

π-Electron manipulation of the 5,6-dihydroxyindole/quinone system by 3-alkynylation: mild acid-mediated entry to (cross)-conjugated scaffolds and paradigms for medium-tunable chromophores.

Capelli L, Crescenzi O, Manini P, Pezzella A, Barone V, d'Ischia M.

J Org Chem. 2011 Jun 3;76(11):4457-66. doi: 10.1021/jo200232t. Epub 2011 May 10.

PMID:
21539372
2.

Lack of visible chromophore development in the pulse radiolysis oxidation of 5,6-dihydroxyindole-2-carboxylic acid oligomers: DFT investigation and implications for eumelanin absorption properties.

Pezzella A, Panzella L, Crescenzi O, Napolitano A, Navaratnam S, Edge R, Land EJ, Barone V, d'Ischia M.

J Org Chem. 2009 May 15;74(10):3727-34. doi: 10.1021/jo900250v.

PMID:
19385623
3.

Intermolecular π-electron perturbations generate extrinsic visible contributions to eumelanin black chromophore in model polymers with interrupted interring conjugation.

Ascione L, Pezzella A, Ambrogi V, Carfagna C, d'Ischia M.

Photochem Photobiol. 2013 Mar-Apr;89(2):314-8. doi: 10.1111/php.12003. Epub 2012 Nov 2.

PMID:
23002723
4.

Disentangling eumelanin "black chromophore": visible absorption changes as signatures of oxidation state- and aggregation-dependent dynamic interactions in a model water-soluble 5,6-dihydroxyindole polymer.

Pezzella A, Iadonisi A, Valerio S, Panzella L, Napolitano A, Adinolfi M, d'Ischia M.

J Am Chem Soc. 2009 Oct 28;131(42):15270-5. doi: 10.1021/ja905162s.

PMID:
19919162
5.

Intramolecular electronic interactions between nonconjugated arene and quinone chromophores.

Jansen G, Kahlert B, Klärner FG, Boese R, Bläser D.

J Am Chem Soc. 2010 Jun 30;132(25):8581-92. doi: 10.1021/ja910362j.

PMID:
20521832
6.

Short-lived quinonoid species from 5,6-dihydroxyindole dimers en route to eumelanin polymers: integrated chemical, pulse radiolytic, and quantum mechanical investigation.

Pezzella A, Panzella L, Crescenzi O, Napolitano A, Navaratman S, Edge R, Land EJ, Barone V, d'Ischia M.

J Am Chem Soc. 2006 Dec 6;128(48):15490-8.

PMID:
17132016
7.

5,6-Dihydroxyindole oxidation in phosphate buffer/polyvinyl alcohol: a new model system for studies of visible chromophore development in synthetic eumelanin polymers.

Pezzella A, Ambrogi V, Arzillo M, Napolitano A, Carfagna C, d'Ischia M.

Photochem Photobiol. 2010 May-Jun;86(3):533-7. doi: 10.1111/j.1751-1097.2010.00730.x. Epub 2010 Apr 16.

PMID:
20408984
8.

Eumelanin buildup on the nanoscale: aggregate growth/assembly and visible absorption development in biomimetic 5,6-dihydroxyindole polymerization.

Arzillo M, Mangiapia G, Pezzella A, Heenan RK, Radulescu A, Paduano L, d'Ischia M.

Biomacromolecules. 2012 Aug 13;13(8):2379-90. doi: 10.1021/bm3006159. Epub 2012 Jul 17.

PMID:
22651227
9.

Free radical coupling of o-semiquinones uncovered.

Pezzella A, Crescenzi O, Panzella L, Napolitano A, Land EJ, Barone V, d'Ischia M.

J Am Chem Soc. 2013 Aug 14;135(32):12142-9. doi: 10.1021/ja4067332. Epub 2013 Jul 31.

PMID:
23862650
10.
11.

Ultrafast excited state dynamics of 5,6-dihydroxyindole, a key eumelanin building block: nonradiative decay mechanism.

Gauden M, Pezzella A, Panzella L, Napolitano A, d'Ischia M, Sundström V.

J Phys Chem B. 2009 Sep 17;113(37):12575-80. doi: 10.1021/jp903190k.

PMID:
19691267
12.

Efficient synthesis of 5,6-dihydroxyindole dimers, key eumelanin building blocks, by a unified o-ethynylaniline-based strategy for the construction of 2-linked biindolyl scaffolds.

Capelli L, Manini P, Pezzella A, Napolitano A, d'Ischia M.

J Org Chem. 2009 Sep 18;74(18):7191-4. doi: 10.1021/jo901259s.

PMID:
19663515
13.
14.

Exploring the frontiers of synthetic eumelanin polymers by high-resolution matrix-assisted laser/desorption ionization mass spectrometry.

Reale S, Crucianelli M, Pezzella A, d'Ischia M, De Angelis F.

J Mass Spectrom. 2012 Jan;47(1):49-53. doi: 10.1002/jms.2025.

PMID:
22282089
15.

Oxidation chemistry of norepinephrine: partitioning of the O-quinone between competing cyclization and chain breakdown pathways and their roles in melanin formation.

Manini P, Panzella L, Napolitano A, d'Ischia M.

Chem Res Toxicol. 2007 Oct;20(10):1549-55. Epub 2007 Sep 25.

PMID:
17892264
16.

Effect of stacking and redox state on optical absorption spectra of melanins -- comparison of theoretical and experimental results.

Stark KB, Gallas JM, Zajac GW, Golab JT, Gidanian S, McIntire T, Farmer PJ.

J Phys Chem B. 2005 Feb 10;109(5):1970-7.

PMID:
16851181
17.
18.

Synthesis and polymerization studies of organic-soluble eumelanins.

Lawrie KJ, Meredith P, McGeary RP.

Photochem Photobiol. 2008 May-Jun;84(3):632-8. doi: 10.1111/j.1751-1097.2007.00295.x. Epub 2008 Feb 11.

PMID:
18282186
19.

Bottom-up approach to eumelanin photoprotection: emission dynamics in parallel sets of water-soluble 5,6-dihydroxyindole-based model systems.

Corani A, Huijser A, Iadonisi A, Pezzella A, Sundström V, d'Ischia M.

J Phys Chem B. 2012 Nov 8;116(44):13151-8. doi: 10.1021/jp306436f. Epub 2012 Oct 29.

PMID:
23072413
20.

Self-assembly of tetramers of 5,6-dihydroxyindole explains the primary physical properties of eumelanin: experiment, simulation, and design.

Chen CT, Ball V, de Almeida Gracio JJ, Singh MK, Toniazzo V, Ruch D, Buehler MJ.

ACS Nano. 2013 Feb 26;7(2):1524-32. doi: 10.1021/nn305305d. Epub 2013 Jan 29.

PMID:
23320483
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