C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 15/00 (2006.01) C07F 1/08 (2006.01) C08G 79/00 (2006.01) C08K 5/36 (2006.01) G02F 1/35 (2006.01) G02F 1/361 (2006.01) G02F 1/313 (2006.01)
Patent
CA 2074510
The specification identifies dithiolenes which give good performance as the critical region of an optical switch. The dithio- lenes have the formula shown in Figure I wherein: (A) the R groups, any two of which may be the same or different, are selected so as to tune the absorption bands of the molecule for use at the operational wavelength and/or to act as bridges to join mole- cules together; (B) the X groups, any two of which may be the same or different, are selected from S and Se; (C) M is selected from Ni, Pt, Pd and Cu; (D)C = -1 or 0; and (E) (i) when C = -1, Y is a cation to render the molecule electrically neutral; pref- erably Y is selected from ammonium, substituted ammonium, Na +, Li + and K+,(ii) when C = 0, Y is absent (since the mole- cule is neutral there is no change to balance). The dithiolene may be diluted with an organic polymer selected from polyacry- lates, polymethacrylates, such as polymethymethacrylate, polycarbonates, polyisobutylene, polyethylene terephthalate, po- lystyrene and polysiloxane.
Hill Callum Aidan Stephen
Oliver Stephen Nigel
Rush James Douglas
Underhill Allan Edward
Winter Christopher Simon
British Telecommunications Public Limited Company
Gowling Lafleur Henderson Llp
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