Safety of 5,6-Dichloropyrazine-2,3-dicarbonitrile. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about New highly soluble phenoxy-substituted phthalocyanine and azaphthalocyanine derivatives: Synthesis, photochemical and photophysical studies and atypical aggregation behavior. Author is Makhseed, Saad; Tuhl, Ahmad; Samuel, Jacob; Zimcik, Petr; Al-Awadi, Nouria; Novakova, Veronika.
Zn phthalocyanines and corresponding aza-analog azaphthalocyanines substituted with peripheral 2,6-diisopropylphenoxy substituents containing different functional groups (Br, OCH3, and OH) were synthesized and their photophys. properties were studied. UV-visible and 1H NMR analyses confirmed the nonaggregation behavior of the prepared complexes in most organic solvents. All studied compounds showed good photophys. and photochem. properties in THF and DMF with ΦF values at 0.22-0.44 and ΦΔ values ranging between 0.42 and 0.57. Hydroxylated compounds showed good solubility in polar solvents including EtOH, MeOH, acetone and even in aqueous EtOH mixtures Absorption spectra in aqueous EtOH indicated presence of only monomers even at very low EtOH content in H2O (0.5% of EtOH in H2O). Despite this, no fluorescence occurred from ∼50% of EtOH in H2O suggesting presence of aggregates that do not differ from monomers in a shape of absorption spectra.
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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate