Use of compounds which absorbs and fluoresce in the IR range as

Details Use of compounds which absorbs and fluoresce in the IR range as Use of compounds which absorbs and fluoresce in the IR range as

1995-01-27

1996-09-10

Bonner, Melissa

Compositions

Organic luminescent material containing compositions

Inspection penetrant compositions

427 8, 73 36, G01N 2191

Patent

active

055543189

ABSTRACT:
Compounds from the class consisting of the phthalocyanines, naphthalocyanines, the aminium compounds of aromatic amines, the methine dyes or the azulenesquaric acid dyes, which have their absorption maximum in the range from 600 to 1,200 nm and a fluorescence maximum in the range from 620 to 1,200 nm, are used as crack-detecting agents.

REFERENCES:
patent: 3484467 (1969-12-01), Susi et al.
patent: 3560399 (1971-02-01), Irsak
patent: 3679598 (1972-07-01), Alburger
patent: 3708665 (1973-01-01), Prine
patent: 3958119 (1976-05-01), Shigekawa
patent: 4191048 (1980-03-01), Molina
patent: 4990649 (1991-02-01), Schrott, et al.
patent: 5336714 (1994-08-01), Krutak et al.
Bob L. Wheeler, et al., "A Silicon Phthalocyanine and a Silicon Naphthalocyanine: Synthesis, Electrochemistry, and Electrogenerated Chemiluminescence", J. Am. Chem. Soc., 1984, pp. 7404-7410.

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