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Porphyrins Phthalocyanines"],"published-print":{"date-parts":[[2020,5]]},"abstract":"<jats:p>Tetra-substituted zinc(II) and copper(II) phthalocyanines bearing peripheral alkoxy-monoterpene groups were prepared by conventional vs. non-conventional synthetic approaches (ultrasound and microwave irradiation). The synthesis of (1[Formula: see text]-(\u2013)-myrtenol (a) and (1[Formula: see text],2[Formula: see text],5[Formula: see text]-([Formula: see text]-menthol (b) derived phthalonitrile precursors was performed through ipso-nitro aromatic substitution reactions, with optimal conditions being obtained using ultrasound irradiation, which allowed us to achieve full conversions in 4.5 h, with isolated yields up to 74%. The subsequent cyclotetramerization of monoterpene-based phthalonitriles was carried out using Zn(II) or Cu(II) salts as metal templates, and also using conventional and non-conventional heating methods. Microwave-assisted synthesis was shown to be the most efficient approach, providing complete conversions in 1 h, yielding the target monoterpene-based metallophthalocyanines in up to 70% isolated yields. Furthermore, photophysical and photochemical studies revealed that Zn(II) phthalocyanines possess fluorescence quantum yields in the range of [Formula: see text] 0.27\u20130.29, while Cu(II) phthalocyanines exhibited room temperature phosphorescence. In addition, the monoterpene-based Zn(II) phthalocyanines led to high singlet oxygen quantum yields ([Formula: see text] 0.55\u20130.69).<\/jats:p>","DOI":"10.1142\/s1088424620500066","type":"journal-article","created":{"date-parts":[[2020,1,24]],"date-time":"2020-01-24T02:55:37Z","timestamp":1579834537000},"page":"947-958","source":"Crossref","is-referenced-by-count":7,"title":["Monoterpene-based metallophthalocyanines: Sustainable synthetic approaches and photophysical studies"],"prefix":"10.1142","volume":"24","author":[{"given":"Andreia C. 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