New Hybrid Ethylenediurea (EDU) Derivatives and Their Phytoactivity.

Natural and synthetic phytohormones are widely used in agriculture. The synthetic cytokinin ethylenediurea (EDU) induces protection in plants against ozone phytotoxicity. In our study, new hybrid derivatives of EDU were synthesized and tested for phytoactivity. The germination potential (Gp), germination of seeds (G), and relative water content in leaves (RWC), characterizing the drought resistance of plants, were determined. The results of laboratory studies showed that EDU and its hybrid derivatives have a positive effect on root length, the growth and development of shoots, as well as the ability of plants to tolerate stress caused by a lack of water.

Photoinduced guest transformation promotes translocation of guest from hydroxypropyl-ß-cyclodextrin to cucurbit[7]uril.

We report that three-component systems comprising styryl dyes (1 or 2) and two hosts (hydroxypropyl-ß-cyclodextrin (HP-ß-CD) and cucurbit[7]uril (CB[7])) undergo photoinduced transformation and translocation of the styryl guest from the cavity of HP-ß-CD to CB[7]. We find that the protonation of guest trans-1 or the addition of Ba(2+) as competitor for CB[7] triggers dissociation of the container-guest complexes.