Arizona Board of Regents, a Body Corporate

Arizona State University

John Devens Gust, Jr

Thomas A Moore

Ana L Moore

William H Ralston

Paul Anthony Liddell

Stuart Lindsay

Trevor John Thornton

Bradley James Brennan

Alicia Brune

James Ward Bridgewater

Xiaodong Cui

Bharath R Takulapalli

Miguel Andres Gervaldo

Gerard Laws

Porphyrin polymers of Structure 1, where n is an integer (e.g., 1, 2, 3, 4, 5, or greater) are synthesized by the method shown in FIGS.A andB. The porphyrin polymers of Structure 1 are soluble in organic solvents such as 2-MeTHF and the like, and can be synthesized in bulk (i.e., in processes other than electropolymerization). These porphyrin polymers have long excited state lifetimes, making the material suitable as an organic semiconductor for organic electronic devices including transistors and memories, as well as solar cells, sensors, light-emitting devices, and other opto-electronic devices.

Soluble porphyrin polymers

Compounds with aryl ring(s) at porphyrin meso position(s) bearing an amino group in position 4 relative to the porphyrin macrocycle, and at least one unsubstituted 5 (hydrogen-bearing) meso position with the 10-, 15-, and/or 20-relationship to the aryl ring bearing the amino group, and metal complexes thereof, feature broad spectral absorption throughout the visible region. These compounds are electropolymerized to form electrically conducting porphyrin and porphyrin-fullerene polymers that are useful in photovoltaic applications. The structure of one such electrically conducting porphyrin polymer is shown below. 

Electrically conducting porphyrin and porphyrin-fullerene electropolymers

A solid-state field-effect transistor device for detecting chemical and biological species and for detecting changes in radiation is disclosed. The device includes a quantum wire channel section to improve device sensitivity. The device is operated in a fully depleted mode such that a sensed biological, chemical or radiation change causes an exponential change in channel conductance of the transistor.

Quantum wire sensor and methods of forming and using same

The present invention relates to a method for detecting and quantitating NADH/NADand/or NADPH/NADPas well as NADHJNADand/or NADPH/NADPdependent enzymes using a photoelectrochemical cell.

Methods for detection and quantification of analytes

Excitation of a triad artificial photosynthetic reaction center consisting of a porphyrin (P) convalently linked to a fullerene electron acceptor (C) and a carotenoid secondary donor (C) leads to the formation of a long-lived C-P-Ccharge-separated state via photoinduced electron transfer. This reaction occurs in a frozen organic glass down to at least 8 K. At 77 K, charge recombination of C*-P-Coccurs on the &#x3bc;s time scale, and yields solely the carotenoid triplet state. In the presence of a small (20 mT) static magnetic field, the lifetime of the charge-separated state is increased by 50%. This is ascribed to the effect of the magnetic field on interconversion of the singlet and triplet biradicals. At zero field, the initially formed singlet biradical state is in equilibrium with the three triplet biradical sublevels, and all four states have comparable populations. Decay to the carotenoid triplet only occurs from the three triplet sublevels. In the presence of the field, the S and Tstates are still rapidly interconverting, but the Tand Tstates are isolated from the other two due to the electronic Zeeman interaction, and are not significantly populated. Under these conditions, recombination to the triplet occurs only from T, and the lifetime of the charge-separated state increases. This effect can be used as the basis for a magnetically controlled optical or optoelectronic switch (e.g. AND gate).

Magnetic switching of charge separation lifetimes in artificial photosynthetic reaction centers

Excitation of a triad artificial photosynthetic reaction center consisting of a porphyrin (P) convalently linked to a fullerene electron acceptor (C ) and a carotenoid secondary donor (C) leads to the formation of a long-lived C -P-C charge-separated state via photoinduced electron transfer. This reaction occurs in a frozen organic glass down to at least 8 K. At 77 K, charge recombination of C* -P-C occurs on the &mgr;s time scale, and yields solely the carotenoid triplet state. In the presence of a small (20 mT) static magnetic field, the lifetime of the charge-separated state is increased by 50%. This is ascribed to the effect of the magnetic field on interconversion of the singlet and triplet biradicals. At zero field, the initially formed singlet biradical state is in equilibrium with the three triplet biradical sublevels, and all four states have comparable populations. Decay to the carotenoid triplet only occurs from the three triplet sublevels. In the presence of the field, the S and T states are still rapidly interconverting, but the T and T states are isolated from the other two due to the electronic Zeeman interaction, and are not significantly populated. Under these conditions, recombination to the triplet occurs only from T , and the lifetime of the charge-separated state increases. This effect can be used as the basis for a magnetically controlled optical or optoelectronic switch (e.g. AND gate).

Molecular electronic devices and method of making molecular electronic devices having a self-assembled ordered insulating molecular electronic film having insulating molecules attached at one end to a first electrode, and conducting device molecules inserted into the insulating molecular electronic film such that the device molecules are attached at the bottom end to a first electrode and the top end to a second electrode are provided.

Devices based on molecular electronics

A process of pathology or target tissue identification comprising administering an imaging material to a pathology or target tissue bearing mammalian host and irradiating the mammalian host with electromagnetic radiation having a wavelength between about 600 and 1100 nm, and especially in the region of 700 nm and longer wavelengths, whereupon the imaging material, which has been preferentially taken up by the pathology or target tissue, emits light and permits precise identification of the location, size and/or shape of the pathology or target tissue.

Growing community of inventors

Mesa, AZ, United States of America

John Devens Gust, Jr