Blog

Excited States in Cycloparaphenylenes: Dependence of Optical Properties on Ring Length

Taishi Nishihara, Yasutomo Segawa, Kenichiro Itami, and Yoshihiko Kanemitsu

J. Phys. Chem. Lett. ASAP. DOI: 10.1021/jz3014826


Hoop-shaped conjugated molecules, cycloparaphenylenes (CPPs), are simple strings of benzene rings with para linkages that have an ideal quasi-one-dimensional structure without edges. Here, we report optical properties of [n]CPPs (n = 9, 12, 14, 15, 16) clarified by one- and two-photon excitation spectroscopy. We showed that in this system the lowest unoccupied molecular orbital (LUMO) state has the same symmetry as the highest occupied molecular orbital (HOMO) state, and determined the transition energy of the optically forbidden HOMO–LUMO gap. It is found that the ring-length dependence of the HOMO–LUMO transition energy is identical to that of the photoluminescence (PL) energy, and that phonon-assisted transition causes efficient PL.

Related post

  1. Exciton Recombination Dynamics i…
  2. Manganese-Catalyzed Intermolecul…
  3. Cu-Catalyzed aromatic C–H imidat…
  4. Cycloparaphenylene-Based Ionic D…
  5. Creation of negatively curved po…
  6. C-H Activation Route to Dibenzo[…
  7. Corannulene–Helicene Hybrids: Ch…
  8. Regiodivergent Cross-Dehydrogena…

Twitter@Itami Lab

Itami Lab Facebook

Instagram@Itami Lab

This error message is only visible to WordPress admins

Error: API requests are being delayed. New posts will not be retrieved.

There may be an issue with the Instagram access token that you are using. Your server might also be unable to connect to Instagram at this time.

Error: API requests are being delayed for this account. New posts will not be retrieved.

There may be an issue with the Instagram access token that you are using. Your server might also be unable to connect to Instagram at this time.

Error: No posts found.

Make sure this account has posts available on instagram.com.

Click here to troubleshoot

最近の記事

Flickr@Itamilab

天池先輩からコーヒースープ伴夫妻からのお歳暮です!潤さん、宮村さん、ありがとうございます!!武藤さん、ビールありがとうございます!平賀大都わーいやなさん、あつしさん、ありがとうございます!!だいぶ前だけど、Stripes look #ootdHalloween lookラインを洗う時ですら格好良く。戸谷先生教育実習!imageけいしゅう、誕生日おめでとう!誕生日は英吉家!!3年生に名古屋ぼろ勝ちアピール中!!アリシア卒業おめでとう女子会!
PAGE TOP