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Sensors 2009, 9(12), 9816-9857; doi:10.3390/s91209816

Molecular Sensing by Nanoporous Crystalline Polymers

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Received: 29 September 2009 / Revised: 12 November 2009 / Accepted: 13 November 2009 / Published: 3 December 2009
(This article belongs to the Special Issue Gas Sensors 2009)
Abstract: Chemical sensors are generally based on the integration of suitable sensitive layers and transducing mechanisms. Although inorganic porous materials can be effective, there is significant interest in the use of polymeric materials because of their easy fabrication process, lower costs and mechanical flexibility. However, porous polymeric absorbents are generally amorphous and hence present poor molecular selectivity and undesired changes of mechanical properties as a consequence of large analyte uptake. In this contribution the structure, properties and some possible applications of sensing polymeric films based on nanoporous crystalline phases, which exhibit all identical nanopores, will be reviewed. The main advantages of crystalline nanoporous polymeric materials with respect to their amorphous counterparts are, besides a higher selectivity, the ability to maintain their physical state as well as geometry, even after large guest uptake (up to 10–15 wt%), and the possibility to control guest diffusivity by controlling the orientation of the host polymeric crystalline phase. The final section of the review also describes the ability of suitable polymeric films to act as chirality sensors, i.e., to sense and memorize the presence of non-racemic volatile organic compounds.
Keywords: polymer co-crystals; nanoporous crystalline phases; syndiotactic polystyrene; sensing film rigidity; molecular sensors; chiral sensors polymer co-crystals; nanoporous crystalline phases; syndiotactic polystyrene; sensing film rigidity; molecular sensors; chiral sensors
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Pilla, P.; Cusano, A.; Cutolo, A.; Giordano, M.; Mensitieri, G.; Rizzo, P.; Sanguigno, L.; Venditto, V.; Guerra, G. Molecular Sensing by Nanoporous Crystalline Polymers. Sensors 2009, 9, 9816-9857.

AMA Style

Pilla P, Cusano A, Cutolo A, Giordano M, Mensitieri G, Rizzo P, Sanguigno L, Venditto V, Guerra G. Molecular Sensing by Nanoporous Crystalline Polymers. Sensors. 2009; 9(12):9816-9857.

Chicago/Turabian Style

Pilla, Pierluigi; Cusano, Andrea; Cutolo, Antonello; Giordano, Michele; Mensitieri, Giuseppe; Rizzo, Paola; Sanguigno, Luigi; Venditto, Vincenzo; Guerra, Gaetano. 2009. "Molecular Sensing by Nanoporous Crystalline Polymers." Sensors 9, no. 12: 9816-9857.

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