An infrared study of hydrogen bond stability in benzoic acid–trans­1,2­bis(4­pyridyl)ethylene complexes in the solid state and the implications for the design of supramolecular polymers

1999 ◽  
Vol 9 (11) ◽  
pp. 2727-2730 ◽  
Author(s):  
Christopher B. St Pourçain
1987 ◽  
Vol 52 (5) ◽  
pp. 1356-1361
Author(s):  
S. Abdel Rahman ◽  
M. Elsafty ◽  
A. Hattaba

The conformation of elastin-like peptides Boc-Ala-Pro-Gly-Val-APEGM, Boc-Ala-Pro-Gly-Val-Gly-Val-APEGM, Boc-Ala-Pro-Gly-Val-Ala-Pro-Gly-Val-Gly-Val-APEGM, Boc-Ala-Pro-Gly-Val-Gly-Val-Ala-Pro-Gly-Val-Gly-Val-APEGM were examined in solution using circular dichroism at 30 °C, 50 °C, and 70 °C and in solid state by IR at room temperature. The studies show that the β-turn is a significant conformational feature for peptides under investigation in solution at 30 °C and 50 °C, but at 70 °C the tetra, hexa, and decapeptides show the CD feature characteristic of the β-structure while the dodecapeptide spectra show the presence of β-turn which indicates the stability of the β-turn at this chain length. The IR spectra show that in the solid state at room temperature all investigated peptides assume essentially a β-turn except the tetrapeptide which present evidence of antiparallel β-structure. The β-turn contribution in the IR spectra increases with the increase of the chain length of the peptide.


2003 ◽  
Vol 86 (10) ◽  
pp. 3265-3273 ◽  
Author(s):  
Shun-ichi Kawahara ◽  
Chojiro Kojima ◽  
Kazunari Taira ◽  
Tadafumi Uchimaru

2003 ◽  
pp. 2834 ◽  
Author(s):  
Robin K. Harris ◽  
Phuong Y. Ghi ◽  
Robert B. Hammond ◽  
Cai-Yun Ma ◽  
Kevin J. Roberts

1996 ◽  
Vol 105 (16) ◽  
pp. 6645-6664 ◽  
Author(s):  
Scott Davis ◽  
David T. Anderson ◽  
David J. Nesbitt

1999 ◽  
Vol 28 (2) ◽  
pp. 181-182 ◽  
Author(s):  
Toru Obata ◽  
Tetsuro Shimo ◽  
Shigeyoshi Yoshimoto ◽  
Kenichi Somekawa ◽  
Masaru Kawaminami
Keyword(s):  

2009 ◽  
Vol 479 (4-6) ◽  
pp. 211-217 ◽  
Author(s):  
Masae Takahashi ◽  
Yoshiyuki Kawazoe ◽  
Yoichi Ishikawa ◽  
Hiromasa Ito

2019 ◽  
Vol 86 ◽  
pp. 247-255
Author(s):  
Nikolay A. Alemasov ◽  
Nikita V. Ivanisenko ◽  
Bhupesh Taneja ◽  
Vibha Taneja ◽  
Srinivasan Ramachandran ◽  
...  

2014 ◽  
Vol 70 (12) ◽  
pp. o1237-o1238
Author(s):  
Hafiz Abdullah Shahid ◽  
Sajid Jahangir ◽  
Syed Adnan Ali Shah ◽  
Hamizah Mohd Zaki ◽  
Humera Naz

In the title compound, C15H15N3O6, the dihedral angle between the planes of the benzene and imidazole rings is 34.93 (10)°. An intramolecular C—H...O hydrogen bond is observed. In the crystal, O—H...N hydrogen bonds link the molecules into chains parallel to thecaxis.


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