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Sun XY, Zhao P, Jin SF, Liu MC, Wang XH, Huang YM, Cheng ZF, Yan SQ, Li YY, Chen YQ, Zhong YM. Shedding lights on the flexible-armed porphyrins: Human telomeric G4 DNA interaction and cell photocytotoxicity research. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 173:606-617. [DOI: 10.1016/j.jphotobiol.2017.06.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 06/21/2017] [Accepted: 06/24/2017] [Indexed: 01/21/2023]
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Synthesis, G-quadruplexes DNA binding, and photocytotoxicity of novel cationic expanded porphyrins. Bioorg Chem 2015; 60:110-7. [DOI: 10.1016/j.bioorg.2015.05.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 04/29/2015] [Accepted: 05/01/2015] [Indexed: 11/23/2022]
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Procházka M, Šimáková P, Hajduková-Šmídová N. SE(R)RS microspectroscopy of porphyrins on immobilized Au nanoparticles: Testing spectral sensitivity and reproducibility. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.03.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
We report the application of dried Ag hydroxylamine-reduced colloidal drops to surface-enhanced (resonance) Raman scattering (SE(R)RS) study of biomolecules using Raman microspectroscopy. 5,10,15,20-tetrakis(1-methyl-4-pyridyl)porphyrin (TMPyP), amino acid tryptophan, and phospholipid 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) served as testing biomolecules. Ag colloid/biomolecule drop dried on glass support forms a ring in the edge part of the drop in which almost all nanoparticles are clustered. This specific drying process promotes adsorption of the studied biomolecules in highly enhancing sites (“hot spots”) as well as concentrates them in the ring. We were able to obtain SE(R)RS spectra from the ring that cannot be acquired directly from Ag colloidal solutions (SERRS spectrum of1×10−10 M TMPyP by 1 s accumulation time, SERS spectrum of2×10−7 M DSPC). Despite the spectral irreproducibility and problems with spurious bands in some cases, SERS microspectroscopy of studied biomolecules using dried Ag colloid/adsorbate systems improves SERS applicability and sensitivity in comparison to measurements directly from Ag colloidal solution.
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