NDLI: Thermal and other analytical studies on bifenthrin urea co-inclusion complex : A human-guarded insecticide formulation

Content Provider	Springer Nature Link
Author	Dhall, Manish Madan, Anil Kumar
Copyright Year	2017
Abstract	In current study, thermal and other analytical techniques have been successfully utilized in characterization of bifenthrin urea co-inclusion complex (BNUCIC)—a human-guarded insecticide formulation. Bifenthrin (BN)—a widely used pyrethroid insecticide was successfully engulfed in the cavities of hexagonal urea lattice in the presence of a suitable rapidly complexing agent (RCA). Resulting formulation shields human beings from insecticides through direct inhalation, ingestion or dermal contact. Insects will be exposed to insecticide only after BNUCIC comes in contact with water in soil/crops following switching on of water sprinkling/distribution system in the fields. Formation of BNUCIC was characterized by DSC, FTIR, XRD and $^{1}$H-NMR studies. Thermal analysis played a key role in characterization, in estimation of the minimum proportion of RCA needed for complexation and to study the influence of relative proportion of RCA on heat of decomposition of complexes. Thermal analysis depicted gradual increase in heat of decomposition of BNUCIC and excellent r $^{2}$ value with increasing molar fraction of linear chain RCA. Increased heat of decomposition ensures improved physical stability of complexes. Overlay of DSC curves of BNUCIC complexes revealed absence of melting endotherm of insecticide indicating amorphous nature of BN. FTIR spectrum and XRD diffractogram depicted characteristic peaks and interplanar spacings of hexagonal urea. $^{1}$H-NMR spectrum revealed presence of exposed protons of guest moieties in hexagonal urea. BNUCIC exhibited uniform formulation composition and improved dissolution profile. Studies reveal insecticide–fertilizer amalgamation to be a useful technique for formulation of an effective human-guarded insecticide formulation with improved characteristics.
Starting Page	1639
Ending Page	1653
Page Count	15
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	127
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-01-10
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bifenthrin Thermal analysis Calorimetry Handling characteristics Dissolution rate Urea co-inclusion complex Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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