ChemInform Abstract: PHTHALOCYANINE UND VERWANDTE VERBINDUNGEN 9. MITT. SYNTH. UND ELEKTRONENSPEKTREN VON TETRA‐4‐TERT.‐BUTYLPHTHALOCYANINEN

Abstract

T 1401 Das Anhydrid der 4‐tert.‐Butylphthalsäure (I) wird mit Hanrstoff auf ca. 170°C erhitzt; es entsteht das Imid (II), das man durch Behandlung mit Ammoniak zum tert.‐Butylphthalsäurediamid (III) spaltet.

Porphyrazines with Annulated Chalco¬gen-Containing Heterocycle: Study of Spectral-Luminescent Properties and Quantum-Chemical Calculations of the Excited Electronic States

“…In contrast with the H 2 PAPh 8 derivatives, in the absorption spectra of H 2 {SeN 2 }PA(Bz t Bu) 3 ( Figure 2, А, curve 1) the Q 1 (0-0) is relatively narrow (halfwidth 16 nm, which corresponds the data for H 2 PA(Bz t Bu) 4 [10] ). At the same time the 0-0-band of the fluorescence spectrum (Figure 2, A,B, curve 2) is slightly broader (halfwidth 20 nm) and the Stokes shift is 18 nm.…”

“…At 77 K the fluorescence bands ( Figure 2, B, curve 3) as well as absorption bands become narrower and their vibrational structure is better seen. The comparison of the absorption spectrum of H 2 {SeN 2 }-PA(Bz t Bu) 3 (Figure 2, A) with the absorption spectrum of H 2 PA(Bz t Bu) 4 [10] shows that substitution of one benzene ring by 1,2,5-selenadiazole moiety leads to a bathochromic shift of the Q 1 (0-0) band by ∼10 nm. Considerable changes are also observed for H 2 {SeN 2 }PA(Bz t Bu) 3 in the region of the second electronic transition.…”

“…[20] [c] Experimental shifts are calculated using the spectral data reported for H 2 PA [8] and H 2 Pc. [20] [d] Experimental shifts are calculated using the spectral data for tert-butyl substituted derivatives -Н 2 PA(Bz t Bu) 4 , [10] Н 2 {SN 2 }PA(Bz t Bu) 3 [3] and Н 2 {SeN 2 }PA(Bz t Bu) 3 (present work).…”

“…The level B x becomes higher by 200 cm -1 , the level B y -by 2500 cm -1 , while the N x level is lowered by 2400 cm -1 and the N y level by 100 cm -1 (the N levels are no longer quasidegenerate). It should be noted that in the absorption spectrum of H 2 PA(Bz t Bu) 4 in n-heptane which is characterized by narrower absorption bands, two components can be seen in the Soret region: shoulder at 358 nm and maximum at 338.5 nm, [10] i.e. 27530 and 29840 cm -1 (∆E = 1610 cm -1 ).…”

Influence of the Solvent Nature on the Structure of Two-Dimensional Nanoaggregates in Langmuir Layers of Copper Tetra-tert-butyltetrabenzotriazaporphyrin

“…Borovkov from 4-tetrabutylphthalonitrile [20,21] and chromatographically purified on alumina using benzene as an eluent. Its structure was confirmed by NMR, IR and UV-vis spectra.…”