Pt/Pd–Ethynyl Bond Containing Fluorescent Molecular Architectures as Sensors for Nitroaromatics - Molecular Self-Assembly: Advances and Applications - page 271

1

H NMR spectrum of the
product also revealed the formation of a single and symmetrical
product by the appearance of all expected peaks and the neutral
rectangle

of a single and symmetrical product [23].

displayed spectroscopic differences from starting
linkers. Finally, the formation of a [2 + 2] self-assembled product
13

13

was confirmed by MALDI-MS data as evidenced by the peaks

+

at m / z = 2045.5 and 1957.9 corresponding to [M + H ] and [M -

1 1

PEt + MeOH], respectively (M represents the molar mass of intact

3 1

rectangle).
Density functional theory (DFT) calculation was used to obtain
the energy-minimized view of the neutral rectangle 13 (Fig. 9.8).

Figure 9.8 Energy-optimized structure of . Ethyl groups have not

been shown for the sake of clarity [23].

13

9.3 3D Molecular Architectures Containing Ethynyl

Functionality: Molecular Prisms

In supramolecular chemistry examples of 3D structures like cages
and prisms are less known unlike the 2D geometries, which are
plenty [1]. A common approach for building a 3D structure is either
a M combination. Of these two, the former approach is

more common and has been applied in various cases for preparing
3D geometries because of a dearth in tritopic shape-selective Pt/
Pd acceptors [11,20,21,31]. Thus, the design and synthesis of such
tridentate acceptors and their novel 3D structures offer a very
exciting area of research in recent times.

L or M L 3 2 2 3