The stability of β-cyclodextrin-cinnamyl alcohol inclusion complex (β-CD·C9H10·8H2O) was investigated using TG and DSC. The mass loss took place in three stages: the dehydration occurred between 50–120°C; the dissociation of β-CD·C9H10O occurred in the range of 210–260°C; and the decomposition of β-CD began at 280°C. The dissociation of β-CD·C9H10O was studied by means of thermogravimetry, and the results showed: the dissociation of β-CD·C9H10O was dominated by a two-dimensional diffusion process (D2). The activation energyE was 161.2 kJ mol−1, the pre-exponential factorA was 4.5×1013 min−1.
Cyclodextrin is able to form inclusion complexes with a great variety of guest molecules, and the interesting of studies focussed on the energy binding cyclodextrin and the guest molecule.
In this paper, β-cyclodextrin-cinnamyl alcohol inclusion complex was studied by fluorescence spectrophotometry and infrared absorption spectroscopy, and the results show: the stable energy of inclusion complexes of β-CD with weakly polar guest molecules consists mainly of Van der Waals interaction.
Authors:Ayman Hammoudeh, Riyadh Saymeh, and Sabri Mahmoud
The kinetics of the liquid-phase hydrogenation of cinnamyl alcohol over Ir/Al2O3 catalyst (d ≈ 7 nm) was investigated in toluene under mild conditions (T = 25–95 °C, hydrogen pressure = 3–8 bar and cinnamyl
alcohol concentration = 0.0075–0.375 M). The kinetic results could be successfully modeled based on the assumption that the
Langmuir–Hinshelwood surface reaction between competitively adsorbed cinnamyl alcohol and hydrogen is the rate determining
step. The model predicts that cinnamyl alcohol requires two metallic sites to adsorb on with an adsorption constant of 1.4 M−1. The apparent activation energy of the reaction was experimentally determined to be ~26 kJ mol−1.
In field screening tests conducted on selected pest scarabaeids in Hungary, Epicometis (Tropinota) hirta (subfamily Cetoniinae) was attracted to traps baited with either cinnamyl alcohol or trans-anethol. In some tests attraction was also detected to phenethyl alcohol or cinnamyl acetate. In other tests, adults of Cetonia aurata aurata and Oxythyrea funesta (subfamily Cetoniinae) also were attracted to trans-anethol, while the ternary mixture of phenethyl propionate, eugenol and geraniol attracted Potosia cuprea (subfamily Cetoniinae). Some attraction of Valgus hemipterus (subfamily Valginae) to cinnamyl alcohol also was observed. All of the above species are pests of more or less economic importance in Hungary. The attractant chemicals discovered in the present study will form a starting point for the development of effective attractants for the respective pest scarab species.
], herein, we report the effect of immobilized tridentate N -salicylidene- l -histidine Schiff base vanadium complex within the nanoreactors of Al-MCM-41 as catalysts for the epoxidation of geraniol, cinnamylalcohol and trans -2-hexene-1-ol
Authors:M. Tóth, J. Vuts, F. Difranco, R. Tabilio, B. Baric, J. Razov, T. Toshova, M. Subchev, and I. Sredkov
There was no significant difference in the mean catch of
Scop. (Coleoptera: Scarabaeidae, Cetoniinae) in white or blue traps with the floral bait consisting of (
)-cinnamyl alcohol plus (
)-anethol (which is the previously optimized floral bait for the closely related scarab
Poda). Therefore we concluded that both scarabs can be trapped efficiently with the same trap, which could be advantageous from the practical point of view. In seasonal monitoring trials conducted at 8 sites in Europe using blue traps with the floral bait, adult beetles of both
were successfully detected and their flight pattern was clearly established. At the site in Sicily (Italy) only
was present, while in Bulgaria, Croatia and Hungary only
was captured. At a site near Rome (Italy) both scarabs were caught.
Galliano, H., Heller, W. and Sandermann, H. Jr. (1993): Ozone induction and purification of spruce cinnamylalcohol dehydrogenase. - Phytochemistry 32 : 557-563.
Ozone induction and purification of spruce cinnamylalcohol
Authors:R. Thinesh Kumar, N. Clament Sagaya Selvam, T. Adinaveen, L. John Kennedy, and J. Judith Vijaya
Mallat , T , Bodnar , Z , Hug , P , Baiker , A 1995 Selective oxidation of cinnamylalcohol to cinnamaldehyde with air over Bi-Pt/alumina catalysts . J Catal 153 : 131 – 143 10.1006/jcat.1995.1115 .