The electronic properties of three porphyrin—bridge—anchor photosensitizers are reported with 1a , 1e , 3a and 3e or without 2a and 2e an intramolecular dipole in the bridge. The presence and orientation of the bridge dipole is hypothesized to influence the photovoltaic properties due to variations in the intrinsic dipole at the semiconductor—molecule interface. Electrochemical studies of the porphyrin—bridge—anchor dyes self-assembled on mesoporous nanoparticle ZrO 2 films, show that the presence or direction of the bridge dipole does not have an observable effect on the electronic properties of the porphyrin ring. Subsequent photovoltaic measurements of nanostructured TiO 2 semiconductor films in dye sensitized solar cells show a reduced photocurrent for photosensitizers 1a and 3a containing a bridge dipole. The article was received on 18 May , accepted on 15 Jun and first published on 16 Jun
The short video below shows the whitetail feeding in the snowy woods as a mountain lion attacks and takes the prey down for the kill. The real-time action is quick. Experts say most cougar attacks are ambushes, as this video shows. But it's also notable that the attack is head-on rather than from the side or rear. Justin Dellinger, a PhD candidate at the University of Washington, has been conducting the research that seeks to document the impacts Washington's growing wolf population has on deer. As gray wolves are naturally recolonizing Washington State, Dellinger's project is taking advantage of the rare opportunity to study ecosystem responses when a top predator returns.
Here's how to inoculate ourselves against negative ones. Verified by Psychology Today. Insight Therapy. There are a number of plausible reasons for the uptick in older woman-younger man couplings.
For a lot of students, college is a time of self-discovery. Kinesiology junior Victor Mainwaring said he thinks that having a role model is an important part of growth, especially in his own life. He helped teach me a lot of life skills and values that I think are necessary for any human being to be a good person. Simply by being in the public eye, they become role models for young people. According to a survey by the Association of Teachers and Lecturers , 60 percent of primary school teachers in the United Kingdom said their students aspired to be famous athletes, 58 percent said their students aspired to be pop stars and 37 percent said their students just wanted to be famous for being famous.