scholarly journals Variable-temperature FTIR studies on thermal stability of hydrogen bonding in nylon 6/mesoporous silica nanocomposite

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Guisheng Yang
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Anwarhussaini SD ◽  
Smriti Arvind Nahata ◽  
Lipi Deepaakshi Patnaik ◽  
Santosh Ranga ◽  
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Vol 50 (22) ◽  
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Jialiang Xu ◽  
Eliane P. van Dam ◽  
Giulia Giubertoni ◽  
Yves L. A. Rezus ◽  
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Masaharu Akiba ◽  
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The reaction of benzo-15-crown-5 (C14H20O5) ligand with La(NO3)3.7H2O in the presence of HBr has resulted in the production of an exotic sandwich complex, [LaC28H36Br4O10][3Br]. The crystal system is triclinic with space group P1, a = 12.5834(14) Å, b = 13.5816(16) Å, c = 13.8403(16) Å, a = 70.751(2)°, b = 66.773(2)° and g = 67.631(2)°. The cation comprises of the lanthanum atom coordinated to two crowns via three oxygen atoms from each crown in a η3-sandwich fashion. The two phenyl groups of the crown are brominated. The La-OLigand bond lengths are between 2.857(7) and 2.949(7) Å. The trianion [3Br]3- is linear with Br-Br bond lengths of 2.518(2) and 2.560(2) Å respectively. The molecule is stabilized by intermolecular interactions of the type C-H...Br to form dimers and are arranged parallel to bc face.  Keywords: lanthanum, benzo-15-crown-5, hydrogen bonding, bromination, x-ray structure


2002 ◽  
Vol 106 (40) ◽  
pp. 10401-10409 ◽  
Author(s):  
Ramūnas Valiokas ◽  
Mattias Östblom ◽  
Sofia Svedhem ◽  
Stefan C. T. Svensson ◽  
Bo Liedberg

2018 ◽  
Vol 134 (1) ◽  
pp. 269-279 ◽  
Author(s):  
Alexandru Popa ◽  
Viorel Sasca ◽  
Orsina Verdes ◽  
Mariana Suba ◽  
Paul Barvinschi

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