Modulation of a fluorescence switch of nanofiber mats containing photochromic spironaphthoxazine and D-蟺-A charge transfer dye was written by Lee, Eun-Mi;Gwon, Seon-Young;Son, Young-A.;Kim, Sung-Hoon. And the article was included in Journal of Luminescence in 2012.COA of Formula: C27H29N3O This article mentions the following:
Photoswitchable poly(Me methacrylate) (PMMA) nanofiber mats containing spironaphthoxazine (SPO)/electron donor-蟺-acceptor (D-蟺-A) type fluorescent dye (TCF) were prepared by electrospinning. The photoregulated fluorescence switching behaviors of SPO/TCF blended solution and PMMA nanofiber mats containing SPO/TCF were also studied. Not only SPO/TCF blended solution but also PMMA nanofiber mats containing SPO/TCF showed reversible modulation of fluorescence intensity using alternating irradiation with UV and visible light. In the experiment, the researchers used many compounds, for example, 1,3,3-Trimethyl-6′-(piperidin-1-yl)spiro[indoline-2,3′-naphtho[2,1-b][1,4]oxazine] (cas: 114747-45-4COA of Formula: C27H29N3O).
1,3,3-Trimethyl-6′-(piperidin-1-yl)spiro[indoline-2,3′-naphtho[2,1-b][1,4]oxazine] (cas: 114747-45-4) belongs to piperidine derivatives. The piperidine structural motif is present in numerous natural alkaloids. These include piperine, which gives black pepper its spicy taste. Some chemotherapeutic agents have piperidine moiety within their structure, foremost among them, vinblastine and raloxifene.COA of Formula: C27H29N3O
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem