| 摘要 |
A gas sensor has a gas-sensing component which changes color and/or conductivity on exposure to certain gases, which component comprises a (mono, di or tri) azatetrabenzoporphyrin. Certain (mono, di or tri) azatetrabenzoporphyrins containing a transition metal ion selected from chromium (III), vanadyl, manganese, cobalt or iron (III) are novel. |
| 申请人 |
BRITISH TECHNOLOGY GROUP LTD., LONDON, GB |
发明人 |
SILVER, JACK, LONDON NW11 8AD, GB;RICKWOOD, KENNETH, RALPH, COLCHESTER, ESSEX CO3 4SB, GB;AHMET, MUSTAFA, TAHSIN, BECKENHAM KENT BR3 1JE, GB |
