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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Chem Sci. 2013 Sep;4(9):3740–3747. doi: 10.1039/C3SC50858G

Figure 4.

Figure 4

(a) Proposed scheme for the formation of the Re(Quin)(CO)3(His) HCM upon heating and the subsequent formation of the α-helix upon cooling. (b) Observed changes in the CD spectrum upon the heating and subsequent cooling of the Re-HCM peptide. (c) Changes in the CD signal (222 nm) during heating and cooling. (d) The emission spectrum of the Re-HCM peptide obtained after the heating/cooling cycle (λexc = 410 nm). (e) The IR spectrum of the Re-HCM peptide. The peptide sample was first lyophilized and then combined with KBr to make a pellet.