in situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted...

9
In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A. N. Cammidge, M. J. Cook, J. L. Sosa-Sanchez, A. K. Sharma, and A. K. Ray Interface Volume 9(66):183-189 January 7, 2012 ©2012 by The Royal Society

Upload: alice-horton

Post on 04-Jan-2016

214 views

Category:

Documents


2 download

TRANSCRIPT

Page 1: In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A

In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and

selected biological cofactors

by C. Pal, A. N. Cammidge, M. J. Cook, J. L. Sosa-Sanchez, A. K. Sharma, and A. K. Ray

InterfaceVolume 9(66):183-189

January 7, 2012

©2012 by The Royal Society

Page 2: In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A

(a) Structural representation of bis[1,4,8,11,15,18,22,25-octakis(octyl)phthalocyaninato] lutetium(III), R16Pc2Lu, R = C8H17 (octyl) chains, (b) AFM image of R16Pc2Lu film surface and

(c) thickness scale.

C. Pal et al. J. R. Soc. Interface 2012;9:183-189

©2012 by The Royal Society

Page 3: In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A

Electronic absorption spectra of R16Pc2Lu as (a) neutral film, (b) Br2-oxidized film and (c) neutral species in solution.

C. Pal et al. J. R. Soc. Interface 2012;9:183-189

©2012 by The Royal Society

Page 4: In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A

Plots of stability of Br2-oxidized film of R16Pc2Lu after (a) 3 h, (b) 1 day, (c) 5 days, (d) 13 days of oxidation.

C. Pal et al. J. R. Soc. Interface 2012;9:183-189

©2012 by The Royal Society

Page 5: In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A

UV–visible absorption spectral changes as a function of time (indicated by arrows) during neutralization of R16Pc2Lu+ by water in the presence of a 1.5 M LiClO4 aqueous solution.

C. Pal et al. J. R. Soc. Interface 2012;9:183-189

©2012 by The Royal Society

Page 6: In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A

UV–visible absorption spectral changes as a function of time (indicated by arrows) of R16Pc2Lu+ in 3 mM NADH dissolved in a 1.5 M LiClO4 aqueous solution.

C. Pal et al. J. R. Soc. Interface 2012;9:183-189

©2012 by The Royal Society

Page 7: In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A

UV–visible absorption spectral changes as a function of time (indicated by arrows) of R16Pc2Lu+ in 3.5 mM vitamin C in a 1.5 M LiClO4 aqueous solution.

C. Pal et al. J. R. Soc. Interface 2012;9:183-189

©2012 by The Royal Society

Page 8: In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A

Plot of ln(At − A∞) versus time for 3 mM NADH (dashed line) and 3.5 mM vitamin C (solid line) in a 1.5 M LiClO4 aqueous solution.

C. Pal et al. J. R. Soc. Interface 2012;9:183-189

©2012 by The Royal Society

Page 9: In situ chemichromic studies of interactions between a lutetium bis-octaalkyl-substituted phthalocyanine and selected biological cofactors by C. Pal, A

Plot of kobs versus concentration of NADH (dashed line) and vitamin C (solid line) in a 1.5 M LiClO4 aqueous solution.

C. Pal et al. J. R. Soc. Interface 2012;9:183-189

©2012 by The Royal Society