University of Illinois

Aaron L Petronico

Ralph G Nuzzo

M Christina White

Mikayla A Yoder

Jinpeng Zhao

Jennifer R Griffin

Sean E Lehman

Shauna M Paradine

Marjorie M Potter

An autonomous light management system for a window includes an electrochromic film stack comprising an electrochromic layer on a first transparent electrode, an ion storage layer on a second transparent electrode, and an electrolyte sandwiched between the ion storage and electrochromic layers. The electrochromic film stack exhibits a transmissive state or an absorptive state depending on charging or discharging of the electrochromic layer. The light management system further comprises an array of power units disposed on a front surface of the electrochromic film stack, where each power unit comprises at least one solar microcell. Collectively, the solar microcells cover an area no greater than about 6% of a total area of the front surface. The array of power units is configured to control the charging and discharging of the electrochromic layer, thereby manipulating light transmission through the electrochromic film stack.

Autonomous light management system for a window and method of controlling light transmission

The invention provides novel manganese catalysts such as [Mn(BuPc)], which are general for the amination of all types of C(sp)-H bonds (aliphatic, allylic, propargylic, benzylic, ethereal), including strong 1aliphatic C&#x2014;H bonds, while achieving excellent chemoselectivity, stereospecificity, and high functional group tolerance. We demonstrate the late-stage diversification of bioactive complex molecules that encompass the range of C(sp)-H bond types, such as selective 1C&#x2014;H aminations of betulinic acid and pleuromutilin derivatives. The catalysts' unprecedented balance of reactivity and selectivity is in part attributed to its mechanism of C&#x2014;H amination that lies between stepwise and concerted.

General catalyst for C-H functionalization

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Champaign, IL, United States of America

Aaron L Petronico