Associate Professor CHI Chunyan

Ph.D, 2004, Max-Planck-Institute for Polymer Research, Germany
Postdoc., 2007, University of California at Santa Barbara, USA

Contact Information

Department of Chemistry, NUS 
3 Science Drive 3 
Singapore 117543 

Office: MD1-14-03G
Tel: (65)-6516-5375
Fax: (65)-6779-1691

Postdoctoral and Ph.D. Positions available

We are seeking talented and self-motivated young scientists who are interested in macromolecular chemistry, organic chemistry or materials science at Ph.D. and Postdoctoral level. Application including CV, research summary and reference contact information should be submitted to Dr. Chi

Research Interests

Materials Chemistry/Organic Chemistry/Physical Chemistry

The overall research goal is towards the structural design, synthesis and physical properties of the new organic materials with their applications on organic electronic/optoelectronic devices, chemosensors and biosensors.

(1) Organic Electronic/Optoelectronic Materials

The structural design and synthesis of the monodisperse pi-conjugated oligomers, dendrimers and novel polymers will be focused. Oligomers can serve as the model compounds for understanding the relationship of structure and properties of their corresponding polymers. Moreover, they can also be used as defect-free materials for organic devices. New homopolymers and copolymers with special functional groups will be developed to obtain high quantum yield and/or high charge carrier mobility. We are interested in their physical properties (including the electronic, electrochemical, thermal and photophysical properties) and their applications in organic electronics such as field effect transistors (FETs), solar cells and light-emitting diodes (LEDs). Some examples are shown below.

(2) Liquid Crystalline Materials

We are also interested in the design, characterization and application of various liquid crystalline materials. Techniques such as X-ray diffraction, DSC, polarized optical microscope, and electronic microscopy etc. will be used to investigate their thermal behavior and solid-state stacking. As a special aim, we are interested in fabricating large-area monodomain alignment layer of the LC materials on certain substrates, which will be important for high performance FETs and polarized LEDs.

(3) pi-Conjugated Polyelectrolytes

Ionic π-conjugated polymers have attracted interests due to their interesting self-assembly properties and wide applications in chemosensors/biosenors and multi-layer LEDs. Our research goal is to design new polymeric structures with high luminescence quantum yields and to develop sensors with high selectivity and sensitivity on DNA, proteins and various ions.

Representative Publications

  • X. Shi, E. Quintero, S. Lee, L. Jing, T. S. Herng, B. Zheng, K.-W. Huang, J. T. L. Navarrete, J. Ding,* D. Kim,* J. Casado,* C. Chi* "Benzo-thia-fused [n]Thienoacene-quinodimethanes with Small to Moderate Diradical Characters: The Role of Pro-aromaticity versus Anti-aromaticity" Chem. Sci. 20167, in press.

  • G. Dai, J. Chang, J. Luo, S. Dong, N. Aratani, B. Zheng, K.-W. Huang, H. Yamada, C. Chi* "Z-Shaped Pentaleno- Acene Dimers with High Stability and Low Band Gap" Angew. Chem. Int. Ed., 201655, in press.

  • X. Shi, W. Kueh, B. Zheng, K.-W. Huang, C. Chi* "Dipolar Quinoidal Acene Analogues as Stable Isoelectronic Structures of Pentacene and Nonacene" Angew. Chem. Int. Ed., 201554, 14412.

  • X. Shi, P. M. Burrezo, S. Lee, W. Zhang, B. Zheng, G. Dai, J. Chang, J. T. L. Navarrete, K.-W. Huang,* D. Kim,* J. Casado,* C. Chi*, “Antiaromatic Bisindeno-[n]thienoacenes With Small Singlet Biradical Characters: Syntheses, Structures and Chain Length Dependent Physical Properties” Chem. Sci. 20145, 4490-4503. (Highlighted in SYNFACTS 2014, 10, 1270)

  • Q Ye, C. Chi*, “Recent Highlights and Perspectives on Acene Based Molecules and Materials”, Chem. Mater. 201426, 4046-4056. (Perspective).

  • Z. Sun,Qun Ye,C. Chi*, J. Wu*, “Low band gap polycyclic hydrocarbons: from closed-shell near infrared dyes and semiconductors to open-shell radicals”, Chem. Soc. Rev., 2012, 41, 7857-7889.

  • H. Qu, W. Cui, J. Li, J. Shao, C. Chi* “6, 13-Dibromopentacene [2,3:9,10]-Bis(dicarboximide): A Versatile Building Block for Stable Pentacene Derivatives” Org. Lett., 2011, 13, 924-927. (Highlighted in SYNFACTS 2011, 5, 0492)

  • C. Chi, A. Chworos, J. Zhang, A. Mikhailovsky, G. C. Bazan*, “Anatomy and Growth Characteristics of Conjugated Polyelectrolyte/DNA Aggregates.” Adv. Funct. Mater. 2008, 18, 3606-3612. Inside Front Cover in issue 22, November 24, 2008.

  • C Chi, A. Mikhailovsky, G. C. Bazan*, “Design of Cationic Conjugated Polyelectrolytes for DNA Concentration Determination” J. Am. Chem. Soc. 2007, 129, 11134-11145.