Molecular materials II Part B. Molecular electronics?

Abstract

Assuming that a suitable bistable molecule can actually be reliably synthesized and is chemically sufficiently stable, the major areas of concern are the errors in knowing or setting the switch state of the bistable molecule which arise from quantum fluctuations, and heat dissipation, as well as addressing (input/output contacts) limitations. Thermal degradation via bond breaking is also a concern.["* 331 For optical read/write systems the typical less than unit absorption (quantum yield), photochemical bond breaking, and switching errors are potentially additional limitations.t331 It must not be construed that stable molecular based materials of sufficient purity, be they organic, organometallic, polymers, or inorganic coordination complexes, are easily and reproducibly prepared. These are enormous research projects unto themselves. For the sake of argument, however, we will assume that these are surmountable challenges.

Picosecond molecular switch based on the influence of photogenerated electric fields on optical charge transfer transitions

“…The design and production of state-of-the-art electronic and opto-electronic devices depends increasingly on the ability to produce ever-higher densities of circuit elements within integrated circuits [1]. As technical progress reduces component sizes closer to molecular dimensions, it is clear that new and fundamental research into the distinctly different physical phenomena that may occur in molecular electronics as compared to larger scale electronics is necessary.…”

Self-Assembly of Octarhenium-Based Neutral Luminescent Rectangular Prisms

“…The extended conjugation present in tpeb drives it to recognize the guest molecules on the surface of 1-3 as well as 4 (due to π-π interactions). However, the M 8 L 2 L′ 8 type rectangular prisms (1)(2)(3) are considered to be a more superior system than the M 4 L compound (4) for the following reasons: (i) 1-3 are air and moisture stable, whereas 4 is air and moisture sensitive; (ii) 1-3 are synthesized by the self-assembly process in quantitative conversion, but 4 is obtained by a stepwise procedure in low yield; (iii) 1 and 2 exhibit better photoemissive properties (τ ) 22 and 37 ns, respectively) than 4 (τ ) 10 ns) in pyridine.…”

“…Self-assembled supramolecules with precisely designed shape, geometry, and functionality have paved the route toward the use of a "bottom-up" approach toward the design and fabrication of nanoscale devices and molecular machinery. [1][2][3] The underlying principles of self-assembly reside in suitably designed, information-encoded precursor building blocks that fulfill the requirements for recognition, orientation, and termination during the highly precise assembly process. 1,2,4 Many successful examples are now found in the literature.…”

Potential Modulated Attenuated Total Reflectance Spectroscopy of Prussian Blue Films on ITO

“…Determining rates of electron transfer through molecular films is central to a wide range of chemical, physical, and biological processes and, consequently, has important applications in sensors and organic electronic devices 1–5 . The use of optical techniques to study electron transfer kinetics can also provide information on the structure of the molecular film.…”