Polymer Nanoporous and Co-crystalline Phases

2011 ◽  
Vol 1366 ◽  
Author(s):  
Gaetano Guerra ◽  
Christophe Daniel
Keyword(s):  
Final Part ◽  
Syndiotactic Polystyrene ◽  
Crystalline Phases ◽  
Guest Molecules ◽  
Crystalline Structures ◽  
Crystalline Forms

ABSTRACTThe first part of this presentation will be devoted to the description of the two nanoporous crystalline forms and of the various co-crystalline structures which can be obtained with syndiotactic polystyrene (s-PS). Then, the second part will deal with the co-crystals formed with active guest molecules (nonlinear active, fluorescent, photoreactive, chiral, ...) while the final part of the lecture will focus on the possible applications of materials characterized by nanoporous crystalline s-PS phases.

scholarly journals Monomeric and Dimeric Carboxylic Acid in Crystalline Cavities and Channels of Delta and Epsilon Forms of Syndiotactic Polystyrene

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3330
Author(s):  
Antonietta Cozzolino ◽  
Guglielmo Monaco ◽  
Christophe Daniel ◽  
Paola Rizzo ◽  
Gaetano Guerra
Keyword(s):  
Carboxylic Acid ◽  
Hexanoic Acid ◽  
Ftir Spectra ◽  
Syndiotactic Polystyrene ◽  
Guest Molecules ◽  
Characterization Study ◽  
Polarized Ftir ◽  
Crystalline Forms

Delta (δ) and epsilon (ε) co-crystalline forms of syndiotactic polystyrene with a carboxylic acid guest were obtained by sorption of liquid hexanoic acid in syndiotactic polystyrene films exhibiting delta and epsilon nanoporous-crystalline forms. The characterization study is facilitated by axially stretched syndiotactic polystyrene films, used both for polarized FTIR spectra and for WAXD fiber patterns. Particularly informative are two carbonyl-stretching FTIR peaks, attributed to monomeric and dimeric hexanoic acid. The dichroism of these carbonyl peaks indicates that both delta and epsilon phases are able to include hexanoic acid as isolated guest molecules, while only the epsilon phase is also able to include dimeric hexanoic acid molecules in its crystalline channels. The inclusion of both isolated and dimeric hexanoic acid species in the epsilon form crystalline channels produces extremely fast hexanoic acid uptakes by syndiotactic polystyrene epsilon form films.

New Perovskite Based Structures in the Bi-Sr-O System

1992 ◽  
Vol 275 ◽  
Author(s):  
Bokhimi ◽  
M. Portilla
Keyword(s):  
Cell Parameter ◽  
Crystalline Phases ◽  
Space Group ◽  
Crystalline Structures ◽  
Cell Parameters ◽  
Group I

ABSTRACTWe report one amorphous and four new crystalline phases in the Bi-Sr-0 system. The structure of three of the crystalline phases was identified. The Br10Bi6O24-y phase, which is cubic with space group Fm3m and cell parameter a = 0.8471(1) nm. The SreBi10O27-y phase, which is tetragonal with the space group I/mmm, and cell parameters a = 0.6007(1), c = 0.8376(1) nm. The SreBi10O27-y phase, which is tetragonal with space group I/mmm and cell parameters a = 1.3221(1), c = 0.4249(1) nm. We show that in the crystalline structures Sr and Bi occupy equivalent sites.

Thermal Transitions of ε Crystalline Phases of Syndiotactic Polystyrene

2007 ◽  
Vol 40 (26) ◽  
pp. 9470-9474 ◽  
Author(s):  
Paola Rizzo ◽  
Concetta D'Aniello ◽  
Anna De Girolamo Del Mauro ◽  
Gaetano Guerra
Keyword(s):  
Syndiotactic Polystyrene ◽  
Thermal Transitions ◽  
Crystalline Phases

The Role of Shape and Size of Guest Molecules in the Formation of Clathrates and Intercalates of Syndiotactic Polystyrene

2013 ◽  
Vol 214 (17) ◽  
pp. 1901-1911 ◽  
Author(s):  
Oreste Tarallo ◽  
Finizia Auriemma ◽  
Odda Ruiz de Ballesteros ◽  
Rocco Di Girolamo ◽  
Claudia Diletto ◽  
...  
Keyword(s):  
Syndiotactic Polystyrene ◽  
Guest Molecules ◽  
Shape And Size

Covalent organic frameworks with spatially confined guest molecules in nanochannels and their impacts on crystalline structures

2016 ◽  
Vol 52 (7) ◽  
pp. 1498-1500 ◽  
Author(s):  
Jia Gao ◽  
Donglin Jiang
Keyword(s):  
Covalent Organic Frameworks ◽  
X Ray Diffraction ◽  
Spatial Confinement ◽  
Guest Molecules ◽  
One Dimensional ◽  
X Ray ◽  
Crystalline Structures

One-dimensional channels of covalent organic frameworks enable the spatial confinement of guest molecules that tune the X-ray diffraction behaviours of the network lattice.

Oriented Nanoporous Hostδ Phases of Syndiotactic Polystyrene as a Tool for Spectroscopic Investigation of Guest Molecules

2006 ◽  
Vol 234 (1) ◽  
pp. 102-110 ◽  
Author(s):  
Alexandra R. Albunia ◽  
Alfonso Grassi ◽  
Giuseppe Milano ◽  
Paola Rizzo ◽  
Vincenzo Venditto ◽  
...  
Keyword(s):  
Spectroscopic Investigation ◽  
Syndiotactic Polystyrene ◽  
Guest Molecules
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