Please use this identifier to cite or link to this item: http://hdl.handle.net/11189/3403
Title: Inclusion of caffeine by a diol host
Authors: Jacobs, Ayesha
Nassimbeni, Luigi R.
Nohako, Kanyisa L.
Roman, Gaëlle
Sebogisi, Baganetsi K.
Keywords: Inclusion compounds;Hydrogen bonding;Kinetics;Diol host;Caffeine
Issue Date: 2011
Publisher: Springer
Source: Jacobs, A. (2011). Inclusion of caffeine by a diol host. Journal of Chemical Crystallography, 41(5): 610-616
Abstract: The host compound 9,9′-(ethyne-1,2-diyl)-bis(fluoren-9-ol), H, forms inclusion compounds with caffeine (H·CAF) and methanol (H·MeOH). The host and guest ratios were 1:2 and 1:1, respectively. Both of these structures were successfully solved in P-1 with unit cell dimensions for H·CAF: a = 7.2121(14) Å, b = 9.2782(19) Å, c = 15.206(3) Å, α = 73.23(3)°, β = 84.20(3)°, γ = 73.39(3)°, Z = 2 and for H·MeOH : a = 9.7592(10) Å, b = 11.2584(11) Å, c = 20.7854(19) Å, α = 97.161(2)°, β = 99.263(2)°, γ = 95.257(2) Å, Z = 2. These crystal structures were studied together with that of a mixed clathrate, H·CAF·MeOH with stoichiometry 2:1:1.5. For H·CAF·MeOH which was solved in P21/c : a = 12.2051(5) Å, b = 46.8023(19) Å, c = 9.0121(4) Å, β = 91.9650(10)°, Z = 4. The kinetics of desolvation of the methanol solvate (H·MeOH) yielded an activation energy of 69.6–83.9 kJ mol−1.
URI: http://hdl.handle.net/11189/3403
http://dx.doi.org/10.1007/s10870-010-9933-1
ISSN: 1074-1542
Appears in Collections:Appsc - Journal Articles (DHET subsidised)

Files in This Item:
File Description SizeFormat 
Jacobs_Ayesha_Nassimbeni_Luigi_R_Nohako_Kanyisa_L_Roman_Gaëlle_Sebogisi_Baganetsi_K_AppSci_2011.pdfMain Article483.79 kBAdobe PDFView/Open
Show full item record

Page view(s)

24
Last Week
0
Last month
5
checked on Oct 22, 2018

Google ScholarTM

Check


This item is licensed under a Creative Commons License Creative Commons