NU 2017-121

INVENTORS

• James Stoddart* (Nobel laureate; Northwestern University, Weinberg College of Arts & Science, Department of Chemistry)
• Zhichang Liu
• Junling Sun

SHORT DESCRIPTION

For developers of high-density data storage, this [2]catenane system produces air-stable radicals with multiple accessible redox states, promising improved electrochemical memory performance.

BACKGROUND

Current organic electronic systems struggle with air instability and limited redox levels. Conventional methods face high degradation rates and few accessible redox states, limiting their effectiveness in high-density electrochemical memory applications. Researchers and engineers need more robust and versatile solutions.

ABSTRACT

This invention demonstrates a mechanically interlocked [2]catenane system that produces persistent air-stable radicals. The system features multiple and tunable redox states achieved by incorporating BIPY and DAP units. Researchers validated these states using EPR, UV-Vis-NIR spectroscopy, HR-MS, XRD analysis, electrochemical methods, and DFT calculations. The results show a series of distinct, adjustable redox states that pave the way for advanced high-density data memory prototypes.

MARKET OPPORTUNITY

The commercial impetus for developing alternatives to traditional DRAM and NAND flash memory is undeniable. The global market for next-generation NVM is experiencing explosive growth, with forecasts projecting a market size ranging from USD 17.7 billion to USD 37.7 billion by the early 2030s, expanding at a compound annual growth rate (CAGR) of between 14.4% and 23.2%. This expansion is driven by the insatiable need for faster, more efficient data storage across a spectrum of applications, from enterprise data centers to consumer mobile devices. (Source: Market.US, 2024)

DEVELOPMENT STAGE

TRL-4 - Prototype Validated in Lab: Key functions have been demonstrated in a laboratory-scale prototype, validating the proof-of-concept of multiple redox states in a [2]catenane system.

APPLICATIONS

• Electrochemical memory devices: Enables high-density data storage solutions.
• Organic electronics: Integrates into advanced electronic circuit designs.
• Redox-based sensing: Applicable for sensors requiring multiple redox states.
• Energy storage systems: Offers potential enhancements in battery or capacitor technologies.

ADVANTAGES

• Constructs air-stable radicals: Achieves stability in ambient conditions for reliable operation.
• Tunable redox states: Provides multiple, adjustable redox levels to optimize data storage.
• Mechanical bond protection: Enhances durability and longevity of the radicals.
• Versatile synthesis: Supports modular design approaches for various electronic applications.

PUBLICATIONS

• J. Fraser Stoddart et al, Highly Stable Organic Bisradicals Protected by Mechanical Bonds, Journal of the American Chemical Society, 2020 Apr 15

IP STATUS

US Issued Patent 10,867,718