{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T14:30:30Z","timestamp":1786977030223,"version":"build-2736575974"},"reference-count":113,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2014,5,6]],"date-time":"2014-05-06T00:00:00Z","timestamp":1399334400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chemistry \u0097 An Asian Journal"],"published-print":{"date-parts":[[2014,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    We designed, synthesized, and evaluated environmentally responsive solvatochromic fluorescent dyes by incorporating weak push\u2013pull moieties. The quantum yields of the push (alkyl)\u2013pull (formyl) pyrene dyes were dramatically enhanced by the introduction of alkyl groups into formylpyrene (1\u2010formylpyrene:\n                    <jats:italic>\u03a6<\/jats:italic>\n                    <jats:sub>F<\/jats:sub>\n                    =0.10; 3,6,8\u2010tri\u2010\n                    <jats:italic>n\u2010<\/jats:italic>\n                    butyl\u20101\u2010formylpyrene:\n                    <jats:italic>\u03a6<\/jats:italic>\n                    <jats:sub>F<\/jats:sub>\n                    =0.90; in MeOH). The new dyes exhibited unique sensitivity to solvent polarity and hydrogen\u2010bond donor ability, and specific fluorescence turn\u2010on\/off properties (e.g., 3,6,8\u2010tri\u2010\n                    <jats:italic>n\u2010<\/jats:italic>\n                    butyl\u20101\u2010formylpyrene:\n                    <jats:italic>\u03a6<\/jats:italic>\n                    <jats:sub>F<\/jats:sub>\n                    =0.004, 0.80, 0.37, and 0.90 in hexane, chloroform, DMSO, and MeOH, respectively). Here, the alkyl groups act as weak donors to suppress intersystem crossing by destabilizing the HOMOs of 1\u2010formylpyrene while maintaining weak intramolecular charge\u2010transfer properties. By using alkyl groups as weak donors, environmentally responsive, and in particular, pH\u2010responsive fluorescent materials may be developed in the future.\n                  <\/jats:p>","DOI":"10.1002\/asia.201402088","type":"journal-article","created":{"date-parts":[[2014,5,6]],"date-time":"2014-05-06T15:42:16Z","timestamp":1399390936000},"page":"1797-1807","source":"Crossref","is-referenced-by-count":38,"title":["Design of Weak\u2010Donor Alkyl\u2010Functionalized Push\u2013Pull Pyrene Dyes Exhibiting Enhanced Fluorescence Quantum Yields and Unique On\/Off Switching Properties"],"prefix":"10.1002","volume":"9","author":[{"given":"Yosuke","family":"Niko","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shunsuke","family":"Sasaki","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Susumu","family":"Kawauchi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katsumi","family":"Tokumaru","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gen\u2010ichi","family":"Konishi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2014,5,6]]},"reference":[{"key":"e_1_2_5_1_2","unstructured":"\u00a0"},{"key":"e_1_2_5_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr900301e"},{"key":"e_1_2_5_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr960386p"},{"key":"e_1_2_5_4_2","unstructured":"\u00a0"},{"key":"e_1_2_5_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tibtech.2009.11.002"},{"key":"e_1_2_5_6_2","doi-asserted-by":"publisher","DOI":"10.1039\/c2sc20404e"},{"key":"e_1_2_5_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja100351w"},{"key":"e_1_2_5_8_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja209292b"},{"key":"e_1_2_5_9_2","doi-asserted-by":"publisher","DOI":"10.1039\/c2ra21544f"},{"key":"e_1_2_5_10_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja9050444"},{"key":"e_1_2_5_11_2","doi-asserted-by":"publisher","DOI":"10.1039\/B818908K"},{"key":"e_1_2_5_12_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr00032a005"},{"key":"e_1_2_5_13_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1124618"},{"key":"e_1_2_5_14_2","doi-asserted-by":"publisher","DOI":"10.1038\/nrm976"},{"key":"e_1_2_5_15_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.211564598"},{"key":"e_1_2_5_16_2","unstructured":"\u00a0"},{"key":"e_1_2_5_17_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja00449a004"},{"key":"e_1_2_5_18_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr00018a001"},{"key":"e_1_2_5_19_2","doi-asserted-by":"publisher","DOI":"10.1021\/la2047646"},{"key":"e_1_2_5_20_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo049824f"},{"key":"e_1_2_5_21_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo201845z"},{"key":"e_1_2_5_22_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo202103q"},{"key":"e_1_2_5_23_2","doi-asserted-by":"publisher","DOI":"10.1021\/ol302150a"},{"key":"e_1_2_5_24_2","unstructured":"\u00a0"},{"key":"e_1_2_5_25_2","doi-asserted-by":"publisher","DOI":"10.1021\/bi00581a025"},{"key":"e_1_2_5_26_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja3055029"},{"key":"e_1_2_5_27_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja0449168"},{"key":"e_1_2_5_28_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja804754y"},{"key":"e_1_2_5_29_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jphotochem.2010.09.002"},{"key":"e_1_2_5_30_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tetlet.2013.01.096"},{"key":"e_1_2_5_31_2","doi-asserted-by":"publisher","DOI":"10.1039\/c0cc04917d"},{"key":"e_1_2_5_32_2","unstructured":"\u00a0"},{"key":"e_1_2_5_33_2","doi-asserted-by":"publisher","DOI":"10.1021\/jz9003685"},{"key":"e_1_2_5_34_2","doi-asserted-by":"publisher","DOI":"10.1039\/c2cp23037b"},{"key":"e_1_2_5_35_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tetlet.2009.10.118"},{"key":"e_1_2_5_36_2","doi-asserted-by":"publisher","DOI":"10.1039\/c2cp41813d"},{"key":"e_1_2_5_37_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo0616660"},{"key":"e_1_2_5_38_2","doi-asserted-by":"publisher","DOI":"10.1021\/jp0712598"},{"key":"e_1_2_5_39_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.201301020"},{"key":"e_1_2_5_40_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tetlet.2011.02.088"},{"key":"e_1_2_5_41_2","doi-asserted-by":"publisher","DOI":"10.1002\/cphc.200500127"},{"key":"e_1_2_5_42_2","unstructured":"\u00a0"},{"key":"e_1_2_5_43_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF01152563"},{"key":"e_1_2_5_44_2","doi-asserted-by":"publisher","DOI":"10.1021\/jz3002019"},{"key":"e_1_2_5_45_2","doi-asserted-by":"publisher","DOI":"10.1021\/jp9905023"},{"key":"e_1_2_5_46_2","unstructured":"\u00a0"},{"key":"e_1_2_5_47_2","first-page":"1","volume":"19","author":"G\u00f6rner 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