کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5271556 | 1385442 | 2013 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
C3v-Symmetric tripodal nitrophenylurea based anion receptors built on structurally preorganized trindane scaffold
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
C3v-Symmetric tripodal anion receptors with three urea or thiourea recognition motifs were synthesized from C3v-symmetric cis,cis,cis-2,5,9-tri-p-bromobenzyltrindane molecular skeleton via Hartwig amination and then formation of urea compounds with the corresponding isocyanate. The anion receptors recognized halide and oxo anions with C3-symmetry through the hydrogen bonding interactions between anions and the NH protons of urea or thiourea groups. The receptors 2 and 3 showed a significant binding affinity toward H2PO4- in DMSO-d6; 392 and 305Â Mâ1, respectively. The strong affinity of H2PO4- anion may be attributed to its tetrahedral geometry and the basicity of H2PO4- anion, allowing it to form stronger hydrogen-bonding.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 54, Issue 49, 4 December 2013, Pages 6708-6711
Journal: Tetrahedron Letters - Volume 54, Issue 49, 4 December 2013, Pages 6708-6711
نویسندگان
Yeon Sil Park, So-Hee Bang, Heung-Jin Choi,