Organic Functional Molecules towards Information Processing and High‐Density Information Storage

Abstract

In this Progress Report, we discuss our recent achievements in design and synthesis of new functional molecules towards information processing at the molecular level and high‐density information storage. These include: 1) new molecular switches, logic gates, and combinational logic circuits based on molecules and ensembles with photochromic spiropyran units that undergo reversible structural transformation among multistates, in response to external inputs such as light, protons, and metal ions; 2) high‐density information storage, mainly focusing on nanometer‐scale electrical recording based on the conductance transition of organic molecules, and multimode data storage on multiresponsive molecules. Relevant progress and an outlook in this area are also discussed.

Comparative Magnetic Studies in the Solid State and Solution of Two Isostructural 1D Coordination Polymers Containing CoII/NiII-Curcuminoid Moieties

“…Indeed, nowadays there are models that predict mononuclear 3d-SMMs in a rationalized way [10], and therefore, using such information with the right organic connectors, we may be able to tune SCM behaviour as well. Nevertheless, the proper progress of this subject requires a deep insight regarding extra factors that can affect the final properties [3][4][5][6]13,14].…”

Light‐Triggered Self‐Assembly of a Spiropyran‐Functionalized Dendron into Nano‐/Micrometer‐Sized Particles and Photoresponsive Organogel with Switchable Fluorescence

“…[2,3] A number of molecular switches and logic gates based on SP derivatives are reported. [4][5][6][7][8][9][10] Meanwhile, assemblies of SP compounds and relevant photomodulation have also attracted attention. In the 1970's, Krongauz et al reported the formation of MC aggregates (referred to as ''quasicrystals'') upon UV irradiation of SP molecules in aliphatic hydrocarbons.…”

Enhancement of electrical bistability through semiconducting nanoparticles for organic memory applications

“…Recent work on organic memory focused on several aspects, including: (i) understanding of the mechanism (Bozano et al 2004;Bandyopadhyay & Pal 2005;Chen & Ma 2006;Rath et al 2006;Paul 2007); (ii) improvement of device parameters by choosing suitable systems (Bandhopadhyay & Pal 2003;Jiang et al 2008;Portney et al 2008); and (iii) addressability for data-storage applications (Jakobsson et al 2005;Mukherjee & Pal 2007). While electrical and dielectric properties at different temperatures have been studied for understanding the mechanism, donor/acceptor systems or molecules with suitable functional groups have been chosen to improve device parameters (Chu et al 2005;Jakobsson et al 2005;Mukherjee & Pal 2007), such as on/off ratio, retention time, threshold voltage and so on.…”