In 2013,Skardziute, Lina; Kazlauskas, Karolis; Dodonova, Jelena; Bucevicius, Jonas; Tumkevicius, Sigitas; Jursenas, Saulius published 《Optical study of the formation of pyrrolo[2,3-d]pyrimidine-based fluorescent nanoaggregates》.Tetrahedron published the findings.COA of Formula: C6H3Cl2N3 The information in the text is summarized as follows:
Pyrrolo[2,3-d]pyrimidine derivatives possessing different sterically-hindered end-groups at position 7 of the heterocycle were studied and compared with respect to nanoaggregate formation ability by the reprecipitation method in aqueous solutions The emergence of nanoaggregates with an increasing water fraction in THF/water mixture was traced by observing sudden changes in spectral and transient fluorescence dynamics accompanied by fluorescence efficiency turn-on. The aggregation induced emission with a maximal 20-fold emission efficiency enhancement was obtained. Tuning of the nanoaggregates sizes from about 50 nm to 600 nm by increasing the THF/water ratio was revealed by electron microscopy. Almost perfect spherical shapes of the nanoaggregates and their structureless fluorescence bands similar to those of their neat amorphous films suggested an amorphous-like nature of the pyrrolo[2,3-d]pyrimidine-based nanoparticles. After reading the article, we found that the author used 2,4-Dichloro-7H-pyrrolo[2,3-d]pyrimidine(cas: 90213-66-4COA of Formula: C6H3Cl2N3)
2,4-Dichloro-7H-pyrrolo[2,3-d]pyrimidine(cas: 90213-66-4) belongs to pyrimidine. The pyrimidine ring system has wide occurrence in nature as substituted and ring fused compounds and derivatives, including the nucleotides cytosine, thymine and uracil, thiamine (vitamin B1) and alloxan. COA of Formula: C6H3Cl2N3
Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia