Dual-State Emission (DSE) of organic molecules in {both|each} {solution|answer|remedy|resolution|option} and solid-state {is an|is definitely an} elusive {property|home|house} {that has|which has} {recently|lately|not too long ago} drawn {significant|substantial|considerable|important} interest. {In this|Within this} {work|function|perform|operate}, we report two molecular rotors 1 and {2|two} with exceptional photoluminescence (PL) in {solution|answer|remedy|resolution|option} (ФPL = 0.53 and ФPL = 0.43) and {in the|within the|inside the} {solid|strong} state (ФPL = 0.92 and ФPL = 0.84). {To the|Towards the|For the} {best|very best|greatest|ideal|finest|most effective} of our {knowledge|understanding|information|expertise|know-how}, {this is|this really is|this can be|that is} {the first|the very first|the initial} report containing Donor-pi-Acceptor-pi-Donor (D-pi-A-pi-D) compounds with {high|higher} quantum yields in {both|each} states that {features|attributes|functions|characteristics|capabilities|options} a rotary acceptor. {Furthermore|Moreover|In addition|Additionally}, we describe the marked variations in PL in {solution|answer|remedy|resolution|option} upon polarity and viscosity {changes|modifications|adjustments|alterations}. TD-DFT computations indicate that these {changes|modifications|adjustments|alterations} are facilitated by the {fast|quick|quickly|rapidly|rapid|speedy} molecular rotation in these molecules. The symmetry (or lack of it) in 1 and {2|two} plays a {crucial|essential|vital|critical|important} {role|function|part} in {producing|creating|generating|making} noticeable {differences|variations} {in the|within the|inside the} X-ray crystal arrays with variations {in the|within the|inside the} solid-state PL. We attribute this DSE behavior {to the|towards the|for the} favorable {combination|mixture} {of the|from the|in the|on the|with the|of your} D-p-A-p-D architecture {and the|and also the|as well as the|along with the|plus the} twisted conformations adopted {in the|within the|inside the} {solid|strong} state. Formula of 6-Bromobenzo[d]isothiazole 1260664-44-5 Chemscene PMID:23357584
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