Isolation and Stabilization of a Pheromone in Crystalline Molecular Capsules. Xiao, W., Hu, C., & Ward, M., D. CRYSTAL GROWTH & DESIGN, 13(7):3197-3200, AMER CHEMICAL SOC, 7, 2013.
abstract   bibtex   
The active monomer form of the male-produced pheromone of the Mediterranean fruit fly can be isolated selectively from its equilibrating trimer species by encapsulation within a calixarene pocket built into a hydrogen-bonded framework from guanidinium 4-sulfocalix[4]arene. Encapsulation of the Delta(1)-pyrroline guest significantly perturbs the assembly of the quasihexagonal two-dimensional guanidinium-sulfonate network of the guest-free framework, to the extent that guanidinium ions are excluded from some sites to accommodate the steric requirements of the guest. Nonetheless, single crystal X-ray diffraction reveals the preservation of a layered structrure in which the calixarene capsules stack in an antiparallel configuration. These observations illustrate that the binding of the pheromone monomer by the calixarene is sufficiently strong to overcome the loss of guanidinium-sulfonate hydrogen bonds, which is corroborated by the strong binding constants measured in solution. The solid-state encapsulation stabilizes the otherwise volatile unstable monomer form, suggesting an effective strategy for the storage, application, and controlled release of an important agricultural adjuvant.
@article{
 title = {Isolation and Stabilization of a Pheromone in Crystalline Molecular Capsules},
 type = {article},
 year = {2013},
 identifiers = {[object Object]},
 pages = {3197-3200},
 volume = {13},
 month = {7},
 publisher = {AMER CHEMICAL SOC},
 city = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
 id = {dace0aa7-d87d-3cf4-a033-fca62f838452},
 created = {2015-12-14T19:51:30.000Z},
 file_attached = {false},
 profile_id = {3187ec9d-0fcc-3ba2-91e0-3075df9b18c3},
 group_id = {d75e47fd-ff52-3a4b-bf1e-6ebc7e454352},
 last_modified = {2017-03-14T12:30:08.401Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 citation_key = {ISI:000321542900058},
 source_type = {article},
 user_context = {Article},
 private_publication = {false},
 abstract = {The active monomer form of the male-produced pheromone of the
Mediterranean fruit fly can be isolated selectively from its
equilibrating trimer species by encapsulation within a calixarene pocket
built into a hydrogen-bonded framework from guanidinium
4-sulfocalix[4]arene. Encapsulation of the Delta(1)-pyrroline guest
significantly perturbs the assembly of the quasihexagonal
two-dimensional guanidinium-sulfonate network of the guest-free
framework, to the extent that guanidinium ions are excluded from some
sites to accommodate the steric requirements of the guest. Nonetheless,
single crystal X-ray diffraction reveals the preservation of a layered
structrure in which the calixarene capsules stack in an antiparallel
configuration. These observations illustrate that the binding of the
pheromone monomer by the calixarene is sufficiently strong to overcome
the loss of guanidinium-sulfonate hydrogen bonds, which is corroborated
by the strong binding constants measured in solution. The solid-state
encapsulation stabilizes the otherwise volatile unstable monomer form,
suggesting an effective strategy for the storage, application, and
controlled release of an important agricultural adjuvant.},
 bibtype = {article},
 author = {Xiao, Wenchang and Hu, Chunhua and Ward, Michael D},
 journal = {CRYSTAL GROWTH & DESIGN},
 number = {7}
}

Downloads: 0