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Organocatalytic Synthesis of Quinine-Functionalized Poly(carbonate)s
Edward, Justin A.,Kiesewetter, Matthew K.,Kim, Hyunuk,Flanagan, James C.A.,Hedrick, James L.,Waymouth, Robert M. American Chemical Society 2012 Biomacromolecules Vol.13 No.8
<P>The ring-opening polymerization of substituted cyclic carbonates with 1-(3,5-bis-trifluoromethyl-phenyl)-3-cyclohexyl-thiourea (TU)/1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) organocatalysts afford highly functionalized oligocarbonates. The fluorescent alkaloid quinine can be readily incorporated into the oligocarbonates either by initiation from quinine or by ring-opening polymerization of a quinine-functionalized cyclic carbonate (MTC-Q). Copolymerization of MTC-Q with a boc-protected guanidinium cyclic carbonate affords, after deprotection, highly water-soluble cationic copolymers functionalized with both quinine and pendant guanidinium groups. When multiple quinine groups are attached to the oligomers, they exhibit minimal fluorescence due to self-quenching. Upon hydrolysis, the fluorescence intensity increases, providing a potential strategy for monitoring the hydrolysis rates in real time.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/bomaf6/2012/bomaf6.2012.13.issue-8/bm300718b/production/images/medium/bm-2012-00718b_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/bm300718b'>ACS Electronic Supporting Info</A></P>
Priscilla Rose Prasath,Justine K. James,Ananya Ruth Samuel,Christine Suniti Bhat,Mutharasi Paramasivan 한국상담학회 2023 Journal of Asia Pacific counseling Vol.13 No.2
This study used a cross-sectional survey design to examine the moderating role of psychological capital (PsyCap) on the association between psychological distress (depression, anxiety, and stress) and well-being among 387 college students in India. PsyCap refers to an individual’s positive psychological state of development that is comprised of hope, efficacy, resilience, and optimism. There was a negative association between psychological distress and well-being, whereas a positive association was found between PsyCap and well-being. As hypothesized, PsyCap moderated the association between psychological distress and well-being. The PsyCap components of hope, efficacy, resilience, and optimism each acted as a moderator in the association between psychological distress and well-being. The practical implications of enhancing PsyCap to positively affect well-being and reduce psychological distress in college students are provided through the lens of positive psychology.