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Amphiphilic chlorins and bacteriochlorins in micellar environments. Molecular design, de novo synthesis, and photophysical properties

Journal Article · · Chemical Science
DOI:https://doi.org/10.1039/c3sc51335a· OSTI ID:1086803
 [1];  [2];  [2];  [3];  [3];  [3];  [3];  [4];  [3];  [2]
  1. North Carolina State University; Washington University
  2. North Carolina State University
  3. Washington University in St. Louis
  4. University of California-Riverside
The incorporation of amphiphilic tetrapyrrole macrocycles in organized media is of great value for a variety of fundamental photochemical studies, yet work to date has chiefly employed porphyrins rather than chlorins or bacteriochlorins. The latter absorb strongly in the red or near-infrared spectral region, respectively. Here, eight amphiphilic macrocycles (six chlorins and two bacteriochlorins) have been designed, synthesized and characterized; the compounds differ in long wavelength absorption (610–745 nm) and peripheral substituents (type of auxochrome, hydrophobic/hydrophilic groups). A methyl pyridinium or benzoic acid substituent at the 15-position provides a polar “tail” whereas a hydrophobic group distal thereto (in the chlorins) provides a lipophilic “head” for the spontaneous incorporation in organized media. The eight (bacterio)chlorins are characterized by static and time-resolved absorption and fluorescence spectroscopy in N,N-dimethylformamide (DMF) and three micellar environments (TX-100, CTAB, and SDS) as well as ultrafast transient absorption studies in DMF.
Research Organization:
Washington Univ., St. Louis, MO (United States); Energy Frontier Research Centers (EFRC) (United States). Photosynthetic Antenna Research Center (PARC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
SC0001035
OSTI ID:
1086803
Report Number(s):
DE--SC0001035-80
Journal Information:
Chemical Science, Journal Name: Chemical Science Journal Issue: 9 Vol. 4; ISSN 2041-6520
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English

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