کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1309217 975198 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the elusive, non-emissive yet reactive, upper excited states of [(4,4′-bpy)ReI(CO)3(dppz)]PF6 (dppz = dipyridil[3,2-a:2′3′-c]phenazine)
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
On the elusive, non-emissive yet reactive, upper excited states of [(4,4′-bpy)ReI(CO)3(dppz)]PF6 (dppz = dipyridil[3,2-a:2′3′-c]phenazine)
چکیده انگلیسی

Gradual solvation of [(4,4′-bpy)ReI(CO)3(dppz)]+ (dppz = dipyridil[3,2-a:2′3′-c]phenazine) by water molecules causes a quenching of the emission in accordance with Perrin’s model of spheres. The calculated radius of the sphere, r = 2.6 ± 0.2 Ǻ, is therefore very close to the distance from the Re center to the oxygen atom of the CO ligands, i.e., l = 2.73 Ǻ. In addition, excited state reactions with TEA produce [(4,4′-bpy−)ReI(CO)3(dppz)] and [(4,4′-bpy)ReI(CO)3(dppz−)]. This experimental observation is inconsistent with the formation of the products in the lowest lying and emissive dppz-centered 3ππ* excited state. Jablonski schemes based on the participation of excited states other than the lowest 3ππ* excited state are proposed.

Gradual solvation of [(4,4′-bpy)ReI(CO)3(dppz)]+ (dppz = dipyridil[3,2-a:2′3′-c]phenazine) by water molecules causes a quenching of the emission in accordance with Perrin’s mechanism. Perrin’s sphere is superimposed with the structure of the complex in the figure. The redox quenching shows the participation of excited states other than the lowest dppz-centered ππ* excited state.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 363, Issue 7, 20 April 2010, Pages 1615–1618
نویسندگان
, , , ,