کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5227573 1383610 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of 32-substituted bacteriochlorophyll-d analogs and their self-aggregation in a nonpolar organic solvent
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis of 32-substituted bacteriochlorophyll-d analogs and their self-aggregation in a nonpolar organic solvent
چکیده انگلیسی

Zinc complexes of 31-epimerically pure 32,32,32-trifluoro-bacteriopheophorbide-d methyl ester were prepared and their self-aggregation was examined in 1% (v/v) dichloromethane and hexane by visible and circular dichroism spectroscopies. Both the synthetic 31-trifluoromethylated diastereomers gave amorphous self-aggregates in the nonpolar organic solvent, while the corresponding nonfluorinated compounds possessing the 31-methyl group formed well-ordered and large oligomers similar to in vivo aggregates of bacteriochlorophyll-d in a chlorosome, a main light-harvesting antenna of green photosynthetic bacteria. The difference is ascribed to steric factor of the 3-CF3 group, which was supported by optical properties of other synthetic zinc 31-hydroxy-131-oxo-chlorins possessing trifluoromethyl or secondary/tertiary substituents at the 31-position in the nonpolar organic solvent.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron - Volume 65, Issue 3, 17 January 2009, Pages 628-637
نویسندگان
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