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POLYMERIC FERROCENE DISPLAY

IP.com Disclosure Number: IPCOM000023390D
Original Publication Date: 1977-Aug-31
Included in the Prior Art Database: 2004-Mar-30
Document File: 2 page(s) / 211K

Publishing Venue

Xerox Disclosure Journal

Abstract

A display which can be read out either in reflection or trans-mission comprises an electrolyte solution of a polymeric ferrocene sandwiched between two imagewise addressable electrodes. These electrodes are well known in the electro-optical art, particularly the liquid crystalline display art and need not be elaborated upon.

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XEROX DISCLOSURE JOURNAL

POLYMERIC FERROCENE DISPLAY Proposed Classification
Thomas W. ~mith U.S. Cl. 350/160
mt. ci. G02b 5/23

A display which can be read out either in reflection or trans-
mission comprises an electrolyte solution of a polymeric
ferrocene sandwiched between two imagewise addressable
electrodes. These electrodes are well known in the electro-
optical art, particularly the liquid crystalline display art
and need not be elaborated upon.

Typical suitable polymeric ferrocenes include poly(vinylfer-.
rocene), commonly referred to as PVF, and cyclopoly(1,l-
divinylferrocene), commonly referred to as CPDVF, and
cyclopoly(1,l-diisopropenyl-ferrocene), commonly referred to
as CPDIPF. A suitable solvent is CH

2C1.

Upon imagewise address of the electrodes, the ferrocene
molecules are oxidized to ferricenium which is absorbed in
image areas. The ferricenium absorbs strongly in the visible
region of the electromagnetic spectrum, and the resulting
image can be read in either reflection or transmission. Era-
sure is accomplished by reversing the applied electrode poten-
tial. The entire process of imaging and erasure exploits the
phenomenon that ferrocene is reversably oxidized to ferricen-
ium during cyclic voltammetry dilute po~ymericferrocene solu-
tions. Solution strengths of about 10 M are suitable.

Volume 2 Number 4 July/August 1977 71

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XEROX DISCLOSURE JOURNAL

72 Volume 2 Number 4 July/August 1977

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