Eun Hye Cha Department of Chemistry, University of Ulsan Self-Assembly of Chiral Molecular Polygons Wenbin Lin, J. Am. Chem. Soc., 2003, 125 (27), 8084–8085 Designed Self-Assembly of Molecular Necklaces Using Host-Stabilized Charge-Transfer Interactions Kimoon Kim, J. Am. Chem. Soc., 2004, 126 (7), 1932–1933

Self-Assembly of Chiral Molecular Polygons Wenbin Lin, J. Am. Chem. Soc., 2003, 125 (27), 8084–8085

Introduction Self-Assembly and Symmetry Considerations Figure 1. “Molecular Library” of cyclic molecular polygons created via the systematic combination of ditopic building blocks with predetermined angles. Peter J. Stang, Chem. Rev., 2000, 100 (3), 853–908 Figure 2. “Molecular Library” for the formation of 3D- assemblies from ditopic and tritopic subunits.

Experimental Scheme 1. Each of the chiral molecular polygons was purified by silica gel column chromatography. Each of the chiral molecular polygons was purified by silica gel column chromatography. Compounds have been characterized by 1 H NMR spectrum, UV-vis, X-ray diffractionquality single crystal, and circular dichroism(CD) spectrum. Compounds have been characterized by 1 H NMR spectrum, UV-vis, X-ray diffractionquality single crystal, and circular dichroism(CD) spectrum. [trans- (PEt 3 ) 2 Pt(L)] n (n = 3-8, 1-6 )

Result Figure 3. 1 H NMR spectra of 1−6 in CDCl 3. Only the aromatic regions are shown. 1 H NMR spectrum

Result Figure 4. Stick and space-filling presentations of the energy-minimized structure of (S)-6. X-ray diffraction-quality single crystal

Result Figure 5. UV−vis spectra of 1−6 in acetonitrile. 0.8% of CH 2 Cl 2 (v/v) was added to the solution of 4−6 to enhance the solubility. UV−vis spectrum 236, 250nm – naphthyl π → π* transitions 288nm - acetylenic π → π* transition 335,360nm - acetylenic π → π* transitions

Result Figure 6. CD spectra of 1−6 in acetonitrile. 0.8% of CH 2 Cl 2 (v/v) was added to the solution of 4−6 to enhance the solubility. Circular dichroism spectrum 260nm – naphthyl π → π* transition 360nm - acetylenic π → π* transition

Designed Self-Assembly of Molecular Necklaces Using Host-Stabilized Charge-Transfer Interactions Kimoon Kim, J. Am. Chem. Soc., 2004, 126 (7), 1932–1933

Scheme 2. Experimental

Result Figure 7. 1 H NMR spectra of 1 in D 2 O (a) before and (b) after addition of 1 equiv of CB[8] ( ♦ ) at 25 °C. 1 H NMR spectra

Result Figure 8. Energy-minimized structure of molecular necklace 2 shown in stick and space-filling models. Hydrogen atoms in CB[8] are omitted. X-ray diffraction-quality single crystal

U 92 LiLi 3 S 16 AuAu 79 N 7 C h e m i s t r y Incorporation of 2,6-Di(4,4’-dipyridyl)-9- thiabicyclo[3.3.1]nonane into Discrete 2D Supramolecules via Coordination-Driven Self-Assembly Na-Ra Han Advanced instrumental analysis lab Reference Seidel, S. R.; Stang, P. J. Acc. Chem. Res. ”High-Symmetry Coordination Cages via Self-Assembly” 2002, 35, Stang, P. J.; Persky, N. E.; Manna, J. J. Am. Chem. Soc. ”Molecular Architecture via Coordination: Self-Assembly of Nanoscale Platinum Containing Molecular Hexagons” 1997, 119,

U 92 LiLi 3 S 16 AuAu 79 N 7 C h e m i s t r y Introduction The synthesis and characterization of three new supramolecular complexes 6-8 (a rhomboid and two hexagons) via coordination-driven self-assembly are reported in excellent yields (>90%). These assemblies have 2,6-di(4,4’-dipyridyl)-9-thiabicyclo[3.3.1]nonane 2 as the bridging tecton. All assemblies were characterized by multinuclear NMR ( 1 H and 31 P), and elemental analysis. The design and synthesis of transition-metal-containing discrete nanoscopic structures via coordination-driven selfassembly is a very popular methodology often utilized in supramolecular chemistry. Several two-dimensional and three-dimensional supramolecular structures with well-defined shapes have been synthesized with potential applications in host-guest chemistry, catalysis, and chemical sensing. As far as two-dimensional macrocyclic structures are concerned, there are numerous examples of smaller polygons, such as triangles, rectangles, and squares. In comparison, there are fewer examples of larger polygons such as pentagons and hexagons. Hexagonal structures are especially interesting because they are one of the most common patterns found in nature.

U 92 LiLi 3 S 16 AuAu 79 N 7 C h e m i s t r y Experomental SCHEME 1. Self-Assembly of 2 with Platinum Acceptors 3-5

U 92 LiLi 3 S 16 AuAu 79 N 7 C h e m i s t r y Result Figure 2. A) 1 H and B) 31 P NMR spectra of Rhomboid 6 in Acetone-d6 / D2O: 5/1 Result

U 92 LiLi 3 S 16 AuAu 79 N 7 C h e m i s t r y Result Figure.3 A) 1 H and B) 31 P NMR spectra of Hexagon 7 in Acetone-d6

U 92 LiLi 3 S 16 AuAu 79 N 7 C h e m i s t r y Result Figure 4. A) 1 H and B) 31 P NMR spectra of Hexagon 8 in Acetone-d 6 / CD 2 Cl 2 : 1/1

SELF-ASSEMBLY OF THREE-DIMENSIONAL M 3 L 2 CAGES VIA A NEW FLEXIBLE ORGANOMETALLIC CLIP. Organic Synthesis Lab Young-ho Song Hai-Bo Yang, Koushik Ghosh, Neeladri Das, and Peter J. Stang* Department of Chemistry, UniVersity of Utah, 315 South 1400 East, RM 2020, Salt Lake City, Utah Org. Lett., 2006, 8 (18), pp 3991–3994

Typical iridovirus Icosahedral Dodecahedron Three-dimensional(3D) architectures

M 3 L 2 -type cage Simplest construction Coordination-driven self-assembly has proven to be a highly effective approach. Cavities Potential applications in host-guest chemistry and catalysis

Trigonal bipyramidal structure Reversibly encapsulate a molecule of C 60 Ikeda, A.; Yoshimura, M.; Udzu, H.; Fukuhara, C.; Shinkai, S. J.Am. Chem. Soc. 1999, 121,

Efficient unit into highly symmetric trigonal prismatic cages Small size It is important to design and synthesize a new molecular clip with a larger Pt-Pt distance. Kuehl, C. J.; Huang, S. D.; Stang, P. J. J. Am. Chem. Soc. 2001, 123,

Diethynylbenzene unit Significant variation in physical properties Acetylene unit Very useful tecton Expectation of new cavity The presence of multiple diethynylbenzene units may provide these 3D cages with new and interesting electronic and photonic properties.

Facile self-assembly of three-dimensional M 3 L 2 cages via the flexible organometallic clip 7

31 P NMR spectra of 7 in CD 2 Cl 2 31 P NMR spectra of 9a in CD 2 Cl 2 31 P NMR spectra of 9b in CD 2 Cl 2

Planar tripod donors 10a and 10b

31 P NMR spectra of 7 in CD 2 Cl 2 31 P NMR spectra of 11a in CD 2 Cl 2 31 P NMR spectra of 11b in CD 2 Cl 2

Larger size of molecular clip 7 Flexible nature of clip 7 The structure of these 3D cages which possess large cavities was established by multinuclear NMR and ESI/MS spectral data along with elemental analysis. Design of clip 7 Design of supramolecular cages 9a, 9b, 11a, and 11b based on a flexble clip 7

Construction of Coordination-Driven Self-Assembled [5 + 5] Pentagons Using Metal-Carbonyl Dipyridine Ligands Liang Zhao,*,† Koushik Ghosh,† Yaorong Zheng,† Matthew M. Lyndon,‡ Taufika Islam Williams,‡ and Peter J. Stang*,† Inorganic Chemistry, Vol.48, No.13, 2009, 5590–5592 Seong Min, Oh Undergraduate fourth

The coordination-driven self-assembly of two metal carbonylcluster-coordinated dipyridyl donors, (4C5H4N) 2 CtCCo 2 (CO) 6 (1) and (4-C5H4N) 2 CtCMo 2 Cp 2 (CO) 4 (2), with a linear diplatinum(II) acceptor ligand was investigated.

Acetylene units (C C) are extensively incorporated into many donor and acceptor building blocks because of their rigid linear conformation. In view of the ready reactivity of a wide range of metal-carbonyl cluster complexes with acetylene moieties, we envisioned that the steric bulk of a metal-carbonyl cluster species adhered to the acetylene moiety may be used as a control factor to adjust the bonding angle of the building block in order to exclusively form a pentagonal self-assembly.

Two charge states at m/z and corresponding to [pentagon - 4CF 3 SO 3 ] 4+ and [pentagon - 6CF 3 SO 3 ] 6+, respectively, were observed and were in good agreement with their theoretical isotopic distributions. The isotopically wellresolved mass peak at m/z , resulting from [hexagon - 5CF 3 SO 3 ] 5+, was found in the MS spectrum as well.(Figure 1 (a)) The ESI-TOF-MS spectrum of 5 displayed four peaks corresponding to four charge states of the [5+5] pentagon, including [M-3CF 3 SO 3 ] 3+ (m/z ), [M-4CF 3 SO 3 ] 4+ (m/z ), [M- 5CF 3 SO 3 ] 5+ (m/z ), overlapping with the 1+fragment), and [M - 6CF 3 SO 3 ] 6+ (m/z ) (Figure 1 (b))

The modeled suprastructures show that the linear acceptor units in the hexagonal structure must distort away from a 180 ° orientation in order to fit the complementarity requirement of a [6 + 6] hexagon, whereas the acceptors retain their 180 ° geometry in themodeled [5+5] pentagonal structure

It have successfully prepared a [5 + 5] supramolecular pentagon by the self-assembly of a molybdenum-carbonyl cluster dipyridyl donor ligand (2) with a linear diplatinum(II) acceptor (3)

The Synthesis of New 60  Organometallic Subunits and Self-Assembly of Three-Dimensional M3L2 Trigonal-Bipyramidal Cages J. Org. Chem, Vol. 71, No. 25, 2006 pp Hai-Bo Yang,* Koushik Ghosh, Atta M. Arif, and Peter J. Stang* Department of Chemistry, Uni V ersity of Utah, 315 South 1400 East, RM 2020, Salt Lake City, Utah Da-Ye Shin

The design and synthesis of three-dimensional cages via coordination-driven self-assembly M 3 L 2 -type cages

Leininger, S.; Stang, P. J.; Huang, S. Organometallics 1998, 17,

Simiilar Figure FIGURE 1. ORTEP diagram of 60° di-Pt(II) diiodide complex 5. FIGURE 2. ORTEP diagram of 60° di-Pt(II) diiodide complex 10. A similar phenomenon has been discussed in the case of the anthracenebased “clip”.

SCHEME 3. Self-Assembly of Supramolecular TBP Cages

31 P NMR spectra of M 3 L 2 TBP cage 15 in Dichloromethane-d2 /Acetone-d6: 7/1 31P NMR spectra of M3L2 TBP cage 14 in Dichloromethane-d2 /Acetone-d6: 7/1 31P NMR spectra of M3L2 TBP cage 13 in Acetone-d6/D2O: 1/1 (A) (B) (C)

All three TBP cages are characterized with multinuclear NMR and electrospray ionization mass spectrometry (ESI-MS) along with element analysis. Design of supramolecular cages M 3 L 2 -type cages