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SUMMARY:A First-of-its-kind Vanadium NIR-II Luminophore
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20211026T160000
UID:2026-05-01-08-19-05@natsci.colostate.edu
DTSTAMP:20260501T081905
Description:Literature Seminar:\n\nAchieving luminescence with earth abunda
 nt metals at room temperature is a difficult task to this day. Minimal ove
 rlap between ligand and 3d orbitals means there are more low energy metal 
 centered states which favor non radiative relaxation back to the ground st
 ate rather than luminescence. Prior to a 2020 report1 of the vanadium(III)
  complex mer-[V(ddpd)2][PF6]3 (ddpd = N\,N′-dimethyl-N\,N′-dipyridine-
 2-ylpyridine-2\,6-diamine) no first row transition metal had been shown to
  emit light in the near-infrared-II range (1000 - 1700nm) at room temperat
 ure. NIR light has many exciting applications such as bioimaging due to de
 eper tissue penetration\, or in telecommunications for optical amplificati
 on. In this presentation I will share how the strong field ligand ddpd ena
 bles intersystem crossing and subsequent NIR phosphorescence in a vanadium
  complex. Design principals learned through this example will be discussed
  for their future use in emissive vanadium complexes as well as first row 
 transition metal complexes with NIR fluorescence.\n\n(1) Dorn\, M.\; Kalmb
 ach\, J.\; Boden\, P.\; Päpcke\, A.\; Gómez\, S.\; Förster\, C.\; Kucze
 linis\, F.\; Carrella\, L. M.\; Büldt\, L. A.\; Bings\, N. H.\; Rentschle
 r\, E.\; Lochbrunner\, S.\; González\, L.\; Gerhards\, M.\; Seitz\, M.\; 
 Heinze\, K. A Vanadium(III) Complex with Blue and NIR-II Spin-Flip Lumines
 cence in Solution. J. Am. Chem. Soc. 2020\, 142 (17). https://doi.org/10.1
 021/jacs.0c02122. 4:00 pm
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