2024-03-29T04:44:08Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/191242016-02-16T06:00:14Zcom_10261_31com_10261_3col_10261_284
Characterization by fourier transform infrared spectroscopy (FT-IR) and 2D IR correlation spectroscopy of PAMAM dendrimer
Popescu, Maria-Cristina
Cruz, C.
Marcos, Mercedes
Serrano, José Luis
et al.
FT-IR and 2D correlation spectroscopy were employed to study the microstructural changes ocurring during phase transitions of a liquid crystal poly(amidoamine) codendrimer (PAMAM (L1)16(L2)16) generation 3, functionalized on the terminal groups by one-chain promesogenic calamitic units (4-(4'-decyloxybenzoyloxy)salicylaldehyde (L1)) and two-chain promesogenic calamitic units (4-(3',4'-didecyloxybenzoyloxy)salicylaldehyde (L2)). Spectral modifications associated with molecular conformation rearangements allowing for molecular shape change on going from a liquid−crystalline organization to another were found. The transition temperatures were calculated, and they are in good agreement with the DSC data. Spectral analysis gives evidence of the LC phase transitions and to an additional transition associated with the existence of conformers. Various types of hydrogen bonding have been established.
Peer reviewed
2009-11-30T08:40:06Z
2009-11-30T08:40:06Z
2006-06-30
artículo
http://purl.org/coar/resource_type/c_6501
Journal of Physical Chemistry B 110(29): 14198-14211 (2006)
1520-6106
http://hdl.handle.net/10261/19124
10.1021/jp061311k
en
http://dx.doi.org/10.1021/jp061311k
none
10752 bytes
application/octet-stream
American Chemical Society