Organic Photoconductive Layers Sensitized with Triarylcarbonium Salts

Kazuhisa Morimoto; Yoshinobu Murakami

doi:10.1364/AO.8.S1.000050

Applied Optics
Vol. 8,
Issue S1,
pp. 50-54
(1969)
•https://doi.org/10.1364/AO.8.S1.000050

Organic Photoconductive Layers Sensitized with Triarylcarbonium Salts

Kazuhisa Morimoto and Yoshinobu Murakami

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Kazuhisa Morimoto and Yoshinobu Murakami, "Organic Photoconductive Layers Sensitized with Triarylcarbonium Salts," Appl. Opt. 8, 50-54 (1969)

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Abstract

The electrophotographic layer consisting of poly-3,6-dibromo-N-vinylcarbazole was sensitized with twenty-seven kinds of triarylcarbonium salts. The carbonium salt compounds used have the formula: ao-8-S1-50-i001

The novel sensitizers differ in two points from the well-known triphenylmethane dyestuffs sensitizers for the organic electrophotoconductors. First, the triphenylmethane dyestuffs have at least two radicals such as amino or dimethylamino radical. The novel sensitizers have not such a radical. Second, the novel sensitizers have an extreme ability to increase the photosensitivity of organic photoconductors. When the photoconductive polymer sensitized with carbonium salts is applied to semitransparent paper, cellophane papers or plastic sheet, a transparent electrophotographic material can be obtained. These materials are superior to sensitized zinc oxide paper in photosensitivity. Such a transparent material can be used as a master for diazo copy, for overhead projection copy or for slides.

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Comp. No.		Melting point (°C)	Absorption λ_max^a (mμ)	Molar absorption coefficient ∊ (10⁻⁴)	Half-decay exposure E₅₀ (lx-sec)
T–1	ClO₄⁻	154–157	410435	0.260.25	5150
T–2	ClO₄⁻	194–195	480	2.1	83
T–3	ClO₄⁻	210–212	415500	3.67.2	29
T–4	ClO₄⁻	131–132	417505	2.76.5	39
T–5	ClO₄⁻	192–193	490	8.5	31
T–6	ClO₄⁻	168–169	488	10.6	50
T–7	ClO₄⁻	148–149	488	4.8	38
T–8	ClO₄⁻	234–235	482	5.6	51
T–9	ClO₄⁻	188–190	485	7.5	36
T–10	ClO₄⁻	287 (dec.)	475	0.13	130
T–11	ClO₄⁻	123–126	455550	0.840.42	119
T–12	ClO₄⁻	115–118	505	5.0	30
T–13	ClO₄⁻	135 (dec.)	440590	1.92.4	22
T–14	ClO₄⁻	141 (dec.)	470660	2.70.8	23
T–15	ClO₄⁻	162 (dec.)	520620	7.10.8	21
T–16	ClO₄⁻	>300	490	0.13	320
T–17	ClO₄⁻	>300	535	0.37	127
T–18	ClO₄⁻	132–134	440520	1.00.6	44
T–19	ClO₄⁻	85–88	425505	2.66.4	.52
T–20	ClO₄⁻	108–112	495	8.6	43
T–21	ClO₄⁻	123–126	445590	2.02.8	40
T–22	ClO₄⁻	98–102	530	0.31	88
T–23	ClO₄⁻	262 (dec.)	510	0.14	310
T–24	ClO₄⁻	247–249	535	0.63	115
T–25	ClO₄⁻	127–130	460580	0.850.52	133
T–26	ClO₄⁻	139–143	500550	5.52.5	24
T–27	ClO₄⁻	174–176	590	14.6	280
Crystal Violet	Cl⁻	187–190	590	9.8	320

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Applied Optics