JPS56110778A - Photochromic material - Google Patents

Photochromic material

Info

Publication number
JPS56110778A
JPS56110778A JP1362580A JP1362580A JPS56110778A JP S56110778 A JPS56110778 A JP S56110778A JP 1362580 A JP1362580 A JP 1362580A JP 1362580 A JP1362580 A JP 1362580A JP S56110778 A JPS56110778 A JP S56110778A
Authority
JP
Japan
Prior art keywords
compd
viologen
formula
light irradiation
photochromic material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1362580A
Other languages
Japanese (ja)
Inventor
Yuichi Takeda
Kenji Murao
Akio Kobi
Yasuki Mori
Yasusada Morishita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1362580A priority Critical patent/JPS56110778A/en
Publication of JPS56110778A publication Critical patent/JPS56110778A/en
Pending legal-status Critical Current

Links

Landscapes

  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Pyridine Compounds (AREA)

Abstract

PURPOSE: To provide a photochromic material which efficiently produces a cationic radical by light irradiation, containing a specified viologen compd. as the main component.
CONSTITUTION: There is provided a photochromic material contg. a viologen compd. of formula I (wherein R is 1W6C alkyl; X is halogen; n is 1W12), water, alcohol and an acid (as a catalyst). The colorless viologen compd. of the formula I produces the reduced colored cationic radical of formula II by electron transfer caused by the excitation due to light irradiation, and is made soluble in a medium due to its ammonia structure. Thus, the compd. is not deposited even during coloring. The coloring and the decoloring of the compd. proceed much easier than those of conventional viologen compd. The formation of the cationic radical by light irradiation can efficiently be conducted.
COPYRIGHT: (C)1981,JPO&Japio
JP1362580A 1980-02-08 1980-02-08 Photochromic material Pending JPS56110778A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1362580A JPS56110778A (en) 1980-02-08 1980-02-08 Photochromic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1362580A JPS56110778A (en) 1980-02-08 1980-02-08 Photochromic material

Publications (1)

Publication Number Publication Date
JPS56110778A true JPS56110778A (en) 1981-09-02

Family

ID=11838410

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1362580A Pending JPS56110778A (en) 1980-02-08 1980-02-08 Photochromic material

Country Status (1)

Country Link
JP (1) JPS56110778A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001037034A3 (en) * 1999-11-03 2002-07-18 Steven A Carlson Optical shutter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001037034A3 (en) * 1999-11-03 2002-07-18 Steven A Carlson Optical shutter
AU772671B2 (en) * 1999-11-03 2004-05-06 Optodot Corporation Optical shutter

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